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WorksheetsStatistics Set 1
Total questions: 140
Worksheet time: 2hrs 52mins
Find the median, mode and range:
3, 5, 7, 9, 11, 8, 3
median:7 mode:9 range:8
median:6 mode:3 range:7
median:7 mode:3 range:8
Calculate the MODE for the data set: 6, 7, 12, 8, 7, 4, 8, 8, 7
7
7.44
8
7 and 8
The act of noticing and describing events or processes in a careful, orderly way.
point of view
observation
secondary source
interpretation
This fractile divides the set into 4 equal parts.
Median
Quartile
Quantile
Decile
Percentile
The median score is also the
75th percentile
5th decile
3rd decile
1st quartile
When a distribution is divided into hundred equal parts, each score point describes the distribution as
percentile
median
quartile
decile
The lower quartile is equal to
50th percetile
25th percentile
2nd decile
3rd quartile
Angie ranks 10th in a class of 40. Her percentile is
75
90
10
25
When a distribution is divided into ten equal parts, each score point describes the distribution as _________
percentile
quantiles
quartile
decile
How many percent corresponds to Q3 if you will interpret it?
A. 25%
B. 50%
C. 75%
D. 90%
What do you call the raw data, that are NOT sorted into categories, classified, or otherwise grouped, usually written in number list?
A. Grouped data
B. Ungrouped data
C. Mixed data
D. Ordered data
The set of scores: 83, 77, 79, 72, 73, 86, 81, 82, 86, 74 and 74 is an example of:
A. Empirical Data
B. Qualitative Data
C. Grouped Data
D. Ungrouped Data
If correlation value is 0.4, then what is correlation for that?
No correlation
Positive correlation
Negative correlation
None
Variance measures shows that
What is data?
How much data is far away
how far a data set is spread out.
None
What is relationship between two variables called?
Relationship
Internship
Correlation
norelation
A way of showing data using bars of different heights/lengths is called ....
bar graph
frequency table
pictograph
tally chart
A way of showing data using symbols or pictures is called ...
bar graph
frequency table
pictograph
tally chart
A table that lists items and shows the frequency or number of times they occur is called ...
bar graph
frequency table
pictograph
tally chart
What is the median of 91, 92, 112, 112, 122, 126, 142, 144
112
117
144
122
What is the mode of 91, 92, 112, 112, 121, 126, 142, 144
112
117
144
122
What is the interquartile range of 91, 92, 112, 112, 121, 126, 142, 144
32
51
35
21
1. These are the numbers that summarize data for an entire population.
A. PARAMETER
B. STATISTIC
C. POPULATION
D. SAMPLE
2. It is the entire group that you want to draw conclusions about.
A. PARAMETER
B. STATISTIC
C. POPULATION
D. SAMPLE
3. It is the average of a data set.
A. MEAN
B. MEDIAN
C. MODE
D. RANGE
5. It is defined as the specific group that you will collect data from.
A. POPULATION
B. SAMPLE
C. MEAN
D. STATISTIC
7. What formula is this?
A. POPULATION STANDARD DEVIATION
B. SAMPLE MEAN
C. SAMPLE VARIATION
D. POPULATION MEAN
9. What formula is this?
A. POPULATION MEAN
B. POPULATION VARIANCE
C. SAMPLE MEAN
D. SAMPLE VARIANCE
It is often used to present graphically categorical (or qualitative) distribution.
circle graph or pie graph
bar graph
line graph
pictograph
Involves drawing conclusions and making prediction based on descriptions of data collected.
Statistics
Inferential Statistics
Descriptive Statistics
Discrete Variable
A statement or theory subjected to a test
hypothesis
conclusion
analysis
problem
It involves the collection, organization, and presentation of data and the summary of important values that describes data.
Inferential Statistics
Descriptive Statistics
Statistics
Qualitative Data
It refers to the entire group of individual, objects, or items. It is usually denoted by N
Population
Sample
Data
Variables
It refers to any specific characteristics or attribute that describes a population or a sample.
Variables
Data
Sample
Population
It is the number of times a score appears in a distribution
frequency distribution
grouped data
Cumulative Frequency
Frequency
It is the midpoint or the middle value in a class.
Class Mark (CM)
Class Boundaries
Class Limits
Class size (i)
the number happening the most
the biggest number minus the smallest number
the middle number
the biggest number minus the smallest number
the middle number
the number happening the most
The measure of central tendency which is given by the x-coordinate of the point of intersection of the 'more than' ogive and 'less than' ogive is :
Mean
Median
Mode
None of these
Median of a given frequency distribution is found with the help of a:
Bar graph
Ogive
Histogram
None of these
A branch of Mathematics that deals with collecting, organizing, analyzing and interpreting?
Statistics
Statestics
Stetistics
Staticstics
_________ is a sample in which each individual or object in the entire population has an equal chance of being selected.
Sample
Random Sample
Population
Bias
_______ is the entire group of objects or individuals considered for a survey.
Sample
Random Sample
Population
Bias
The TV station wants to get the opinion of viewers on the look of a new game-show set. The station's staff calls random people in the phone book. Is this biased or unbiased?
Biased
Unbiased
A student wants to know which type of pizza the students at his high school prefer. Which option would give an unbiased, representative sample?
Asking all the students in the hot lunch line.
Asking every other student who gets off a school bus.
Asking 10 random students from each homeroom.
Asking all the 10th graders.
A sample is a
subset of the main population that has similar characteristics
subset of the main population
population of the study
representation of the population
If you were planning to study the differences in gender when it comes to procrastination in completing assignments. A good sampling technique to address gender equality is
Simple random sampling
Systematic sampling
Stratified sampling
Cluster sampling
If you were conducting a qualitative case study and you feel that your neighbour and anyone that you can easily reach is also good enough then you are using a
convenience sampling technique
Cluster sampling technique
Snowball sampling technique
Stratified sampling technique
If you select your sample based on preset criteria or characteristic then you are using
Judgmental sampling
Snowball sampling
Simple random sampling
quota sampling
What do we call the non-probability sampling that involves the sample being drawn from that part of the population that is close at hand?
Convenience Sampling
Simple Random Sampling
Systematic Sampling
Cluster Sampling
What do we call the probability sampling in which the researcher randomly selects a subset of participants from a population?
Convenience Sampling
Cluster Sampling
Simple Random Sampling
Stratified Sampling
What do we call probability sampling method in which sample members from a larger population are selected according to a random starting point but with a fixed, periodic interval?
Cluster Sampling
Convenience Sampling
Stratified Sampling
Systematic Sampling
What do we call a sample that is drawn from a number of separate strata of the population, rather than at random from the whole population, in order that it should be representative?
Systematic Sample
Stratified Sample
Simple Random Sample
Convenience Sample
What type of sampling occurs when researchers divide a population into smaller groups, then randomly select among these groups to form a sample?
Cluster Sampling
Simple Random Sampling
Convenience Sampling
Systematic Sampling
You want to gain data about the standardized test scores for all the fifth graders in your county. You have access to lists of fifth graders at other local schools and decide to sample randomly from groups of these fifth graders. What type of sampling did you use?
Simple Random Sampling
Convenience Sampling
Cluster Sampling
Stratified Sampling
You want to survey some local people about changes to the county's transit system. You spend the day at a nearby movie theatre, and survey the people who are leaving. What type of sampling was this?
Simple Random Sampling
Systematic Sampling
Stratified Sampling
Convenience Sampling
You are going to poll a sample of students at your school about their views on recess. You put all 300 students' names into a hat, and pull out 30 of them to survey. What type of sampling is this?
Simple Random Sampling
Systematic Sampling
Cluster Sampling
Stratified Sampling
A political pollster wants to survey the population in your state on how they will vote in the next election. They take a list of all the registered voters and send the survey to every fifth person on the list. What kind of sampling is this?
Convenience Sampling
Systematic Sampling
Simple Random Sampling
Stratified Sampling
What kind of sampling are we using if we first divide our population into groups based upon some factor like age, gender, or voting preference?
Stratified Sampling
Systematic Sampling
Simple Random Sampling
Cluster Sampling
Interview every 10th student who enters the school in the morning.
simple random
voluntary response
systematic
convenience
What is the standard deviation for the data given:
5, 10, 7, 12, 0, 20, 15, 22, 8, 2
6.89
10.1
7.26
9
What is the variance for the data given:
5, 10, 7, 12, 0, 20, 15, 22, 8, 2
47.47
102.01
52.77
81
32%
The center of the curve represents what value of a data set?
μ = population mean
δ = population standard deviation
Σ= sum of the data values
Ζ = z or standard scores
What's the standard deviation?
150
60
240
30
Given a variance of 64, what is the standard deviation?
8
4096
0
6.8
1. What is the set of statistical method used to describe the relationship between
independent variables and a dependent variable?
a. regression analysis
b. regression equation
c. regression form
d. regression line
The method of least square regression is used to ___________ the residuals.
minimise
maximise
optimise
None of the above.
The purpose of regression analysis is to
obtain a value of X from a value of Y.
illustrate the correlation using the scatterplot.
measure the degree of association between two variables.
predict a value of dependent variable using the value of an independent variable.
What are residuals?
Extreme scores.
The ratio of explained variation to the total variation.
The mean between the observed scores.
The differences between the observed and expected dependent variable scores.
What is the regression equation used for?
To make the graph looks pretty.
To connect the point.
To indicate where all data points should lie.
To make predictions.
the term regression was introduced by....................
R A Fischer
Sir Francis Galton
Karl Pearson
None of these
Linear regression is a statistical regression method which is used for
Predictive Analysis
Real Analysis
Complex Analysis
Functional Analysis
The percent of total variation of the dependent variable Y explained by the set of independent variables X is measured by
Coefficient of Correlation
Coefficient of Skewness
Coefficient of Determination
Standard Error of Estimate
If the Pearson correlation co-efficient R is equal to 1 then
There is a perfect positive relationship between the two variables
There is a negative relationship between the two variables
There is no relationship between the two variables
There is a positive relationship between the two variables
What test statistic is used for a global test of significance?
Z test
t test
Chi-square test
F-test
R-square is a mathematical notation for
Spearman’s Co-efficient of Rank Correlation
Pearson’s Co-efficient of Correlation
The Co-efficient of Determination
The Co-efficient of Variation
Which of these points appears to be an “Outlier?”
A
B
C
D
This time series plot is an example of:
An increasing trend
Seasonal variation
A decreasing trend
A structural change
This time series plot is an example of:
Seasonality
An increasing trend
Irregular variation
Cyclical variation
This time series plot is an example of:
An increasing trend
Multiple trends
A decreasing trend
A hipster trend
This time series plot is an example of:
Seasonality
Cyclical variation
A decreasing trend
Structural Change
This time series plot is an example of:
Cyclical variation
Irregular change
Seasonality
Multiple trends
This time series plot is an example of:
Cyclical variation
Decreasing trend
Seasonality
Structural change
What is Time Series?
A set of data over a period of time
A set of data over a year
A set of data related with money only
Which one of the following statement BEST describes the time series plot for the period shown?
It shows no trend and no change in variability
It shows increasing linear trend with constant variability
It shows increasing trend with decreasing variability
It shows increasing linear trend with increasing variability
What is the degree of freedom if the sample size is 20?
21
19
20
18
Write the null and alternative hypothesis.
H0: μ1=μ2 H1: μ1=μ2
H0: μ1=μ2
H1: μ1<μ2
H0: μ1=μ2
H1: μ1>μ2
Write the null and alternative hypothesis.
H0: μ1=μ2 H1: μ1=μ2
H0: μ1=μ2
H1: μ1<μ2
H0: μ1=μ2
H1: μ1>μ2
When should you use the t-test? (select all that apply)
When you are testing a proportion/percentage of a population
When you are testing for a mean
When you are given the population standard deviation
When you are ONLY given the sample standard deviation
What is an one-sample t-test used for?
Comparing means from a sample and a population
Comparing means from two separate samples
Comparing means from two related samples
Comparing means from more than two samples
What t-test type compares the means for two groups?
Paired Samples
Independent
Dependent
Mixed
Which best describes a t-test?
It is a type of descriptive statistics.
It is used to determine if there are significant differences.
It can be used as long as the data is not normally distributed
All of the above.
What is an independent t-test used for?
Comparing means from a sample and a population
Comparing means from two separate samples
Comparing means from two related samples
Comparing means from more than two samples
Which t-test would be used for this example?
'Comparing employee satisfaction at Company A and Company B'.
One sample t-test
Independent t-test
Dependent t-test
Variance t-test
What is this?
Gaussian Distribution
Bell Distribution
Skewed Distribution
Platykurtic Distribution
Identify the type of Skewness
positive
negative
normal
right skewed
Identify the type of Skewness
positive
negative
normal
left skewed
Identify the type of kurtosis
mesokurtic
platykurtic
leptokurtic
negative
Identify the type of kurtosis
mesokurtic
platykurtic
leptokurtic
positive
Identify the type of kurtosis
mesokurtic
platykurtic
leptokurtic
bell shape
what test is appropriate for extremely large sample size?
z-test
t-test
central limit theorem
cannot be determined
A math teacher wants to see if two of her classes have the same distribution of test scores. What test should she use?
Chi-square test for Homogeneity.
Chi-square test for independence.
The goodness-of-fit test
random test
Do private practice doctors and hospital doctors have the same distribution of working hours? Suppose that a sample of 100 private practice doctors and 150 hospital doctors are selected at random and asked about the number of hours a week they work. The results are shown in Table 11.33.
State the degree of freedom for the distribution
(a)
ANOVA testing is used for ...
Test for one mean
Test for two means
Test for three or more means
Test for independence between two variables
When should you use the t-test? (select all that apply)
When you are testing a proportion/percentage of a population
When you are testing for a mean
When you are given the population standard deviation
When you are ONLY given the sample standard deviation
When testing with α=0.01 you get p=0.12 . Your decision should be
Reject H0 , there is a significant difference
Acceptundefined, there is NOT a significant difference
Rejectundefined, there is NOT a significant difference
Acceptundefined, there is a significant difference
If you wish to test the claim that the mean of the population is 100, the appropriate alternate hypothesis is
x=100
μ=100
μ=100
μ>100
What is a one-sample t-test used for?
Comparing means from a sample and a population
Comparing means from two separate samples
Comparing means from two related samples
Comparing means from more than two samples
What is an independent t-test used for?
Comparing means from a sample and a population
Comparing means from two separate samples
Comparing means from two related samples
Comparing means from more than two samples
What is a dependent t-test used for?
Comparing means from a sample and a population
Comparing means from two separate samples
Comparing means from two related samples
Comparing means from more than two samples
Which t-test would be used for this example?
Measuring patients' blood sugar before and after they eat a meal
One sample t-test
Independent t-test
Dependent t-test
Variance t-test
Which t-test would be used for this example?
Comparing employee satisfaction at Company A and Company B
One sample t-test
Independent t-test
Dependent t-test
Variance t-test
Which t-test would be used for this example?
Comparing the GPA of students in this class to the average GPA at CSUSB
One sample t-test
Independent t-test
Dependent t-test
Variance t-test
Which t-test would be used for this example?
Comparing reading scores for a classroom of 3rd grade students to a classroom of 5th grade students
One sample t-test
Independent t-test
Dependent t-test
Variance t-test
Which t-test would be used for this example?
Comparing students' reading skills from when they are in 3rd grade to 5th grade
One sample t-test
Independent t-test
Dependent t-test
Variance t-test
____________ includes all of the elements from a set of data while ______________ consists of one or more observations drawn from the population.
(a)
This refers to the maximum number of logically independent values which varies in the data sample.
Level of significance
Percentiles
Degree of freedom
Probability
What is the other term for t-distribution?
Student’s t-distribution
Percentile distribution
Probability distribution
Z-distribution
This refers to the measure of position with data divided into 100 parts.
Percentiles
Deciles
Quartiles
Median
What does the Lorenz curve represent?
Unemployment rates
Income or wealth distribution within an economy
Interest rates
Gross Domestic Product growth
What is the Gini coefficient used to measure?
Inequality
Unemployment rates
Economic growth
Inflation rates
Corrado Gini's coefficient measures inequality by measuring the cumulative proportion of the population and
the cumulative proportion of gross domestic product
the cumulative proportion of gross national product
the cumulative proportion of per capita income
the cumulative proportion of realistic elasticity
Therefore, a Gini coefficient looks at that proportion of the population's ___________ by measuring perfect equality of income against the _______ curve.
expenditure/Palma
production/Palma
income/Lorenz
production/Lorenz
