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Worksheets11.1 Stats LT Reviewer
Total questions: 116
Worksheet time: 4hrs 52mins
Reporting the percent of students in a statistics class who use calculator.
Descriptive
Inferential
Using a sample of 50 tablets to predict the average battery life.
Descriptive
Inferential
A Filipino viewer watches 151 hours of television per month.
Descriptive
Inferential
The average rating of the book ABC by 20 reviewers is 4.6 on a scale of 1 to 5.
Descriptive
Inferential
According to a national report, there were 2.5 problems per one copying machines reported during 2009.
Descriptive
Inferential
Most favorite singer
Qualitative
Quantitative Continuous
Quantitative Discrete
Shoe size
Qualitative
Quantitative Continuous
Quantitative Discrete
Number of Days
Qualitative
Quantitative Continuous
Quantitative Discrete
Binary responses ( e.g. True of False)
Qualitative
Quantitative Continuous
Quantitative Discrete
Student letter grades
Qualitative
Quantitative Continuous
Quantitative Discrete
A listing posted by the Arby’s restaurant chain gives, for each of the sandwiches it sells, the type of meat in the sandwich, the number of calories, and the serving size in ounces. The data might be used to assess the nutritional value of the different sandwiches.
Define the subject in the statement above.
(a)
A listing posted by the Arby’s restaurant chain gives, for each of the sandwiches it sells, the type of meat in the sandwich, the number of calories, and the serving size in ounces. The data might be used to assess the nutritional value of the different sandwiches.
Define the variables in the statement above.
sandwich
number of calories
type of meat
serving size in ounces
nutritional value
The numerical value that describes the sample.
(a)
The characteristics recorded for each individual/subject.
(a)
A type of Statistics that is concerned in describing the population.
(a)
A type of variable that can be placed into distinct categories, attributes or characteristics.
(a)
If Teacher ABC wants to know the effectiveness of virtual classroom to his students and he will ask everyone in one of the sections his handling, will the data be coming from sample or population?
(a)
What does NOT belong to the group?
Number of Siblings
Daily Expenses
Age
Telephone Number
Discrete quantitative variables are variables that can be (a) .
The entire collection of individuals or objects about which information is desired is called a sample.
True
False
_______ data are variables than can be categorized while _______ data are variables that can be counted or measured.
(a)
Select and check ALL examples of quantitative variable below.
Telephone Number
Zip Code
Quiz Score
Age
Daily Expenses
Methods for organizing and presenting data make up the branch of inferential statistics.
True
False
A primary use of inferential statistics involves generalizing from a sample to a population.
True
False
A variable is a characteristic whose value may change from one observation to another.
True
False
Scientists at a major pharmaceutical firm conducted an experiment to study the effectiveness of an herbal compound to treat the common cold. They exposed each patient to a cold virus, then gave them either the herbal compound or a sugar solution known to have no effect on colds. Several days later they assessed each patient’s condition, using a cold severity scale ranging from 0 to 5. They found no evidence of the benefits of the compound.
Define all the variables in the statement above.
old virus
sugar solution
treatment
patient's condition
herbal compound
The manager of a department store records the number of buying customers daily for eight consecutive weeks.
Descriptive
Inferential
There is a relationship between smoking cigarettes and getting emphysema.
Descriptive
Inferential
From past figures, it is predicted that 39% of the registered voters in California will vote in the next election.
Descriptive
Inferential
A math teacher wishes to determine the effect of her teaching technique on the performance of students by comparing selected students grades.
Descriptive
Inferential
The average age of the students in Teacher B statistics class is 21 years.
Descriptive
Inferential
What is the practice or study of collecting and analyzing data?
Context
Statistics
Variables
Probability
Which of the following is a discrete variable?
I. The average height of a randomly selected group of boys
II. The measure of the speed of the boat
III. The total number of students present on the class
I only
II only
III only
I and II
Zip code is an example of ________________.
Can't be determined
qualitative variable
quantitative discrete
quantitative continuous
The entire collection of individuals or objects about which information is desired is called a sample.
True
False
Data are discrete if the possible values are countable.
True
False
The numerical value that describes the population and sample are called parameter and statistic respectively.
True
False
What do you call the study of data?
(a)
Select the best answer on the given choices.
The ratio scale of measurement ____________.
cannot assume negative values
is usually based on counting
usually involves ranking
has a meaningful zero
Select the best answer on the given choices.
The ordinal scale of measurement _______________________.
cannot assume negative values
all of the choices
is based on ranks
has a meaningful zero
Highest educational attainment
Nominal
Ordinal
Interval
Ratio
Body temperature
Nominal
Ordinal
Interval
Ratio
Civil Status
Nominal
Ordinal
Interval
Ratio
Brand of laundry soap being used
Nominal
Ordinal
Interval
Ratio
Total household expenditures last month in peso
Nominal
Ordinal
Interval
Ratio
Number of children in a household
Nominal
Ordinal
Interval
Ratio
Military Title (Lieutenant, Captain, Major)
Nominal
Ordinal
Interval
Ratio
Speed of the car
Nominal
Ordinal
Interval
Ratio
Time (in hours) consumed on Facebook on a particular day
Nominal
Ordinal
Interval
Ratio
What is the lowest level of measurement?
(a)
Biased sampling occurs when some members of a population are systematically more likely to be selected in a sample than others.
True
False
Select two biased sampling below.
Voluntary Response Sampling
Stratified Sampling
Simple Random Sampling
Cluster Sampling
Convenience Sampling
Samples are used to make inferences about populations. Samples are easier to collect data from because they are practical, cost-effective and convenient.
True
False
A teacher samples her class by selecting every third person on her class list
Systematic
Cluster
Simple Random Sampling
Stratified
A teacher samples her class by selecting all students sitting at group 1 and group 5 in her classroom.
Systematic
Cluster
Simple Random Sampling
Stratified
A teacher samples her class by picking 10 numbers from the paper bag and each number is assigned to a student.
Systematic
Cluster
Simple Random Sampling
Stratified
Used for quantitative data and the trend of the line segments is always increasing.
J-Shape
Ogive
Reversed J-Shape
Histrogram
The frequencies are displayed by the height of vertical bars, which are arranged in descending order.
U-Shape
Ogive
Reversed J-Shape
Histrogram
It displays the data by using lines that connect points plotted for the frequencies at the midpoints.
Frequency Polygon
Ogive
Reversed J-Shape
Bell Shape
A graph that represents the class boundaries and cumulative frequencies.
Uniform
Ogive
J-Shape
Bell Shape
The least frequency is on the center and it has approximately symmetric ends.
Histogram
Ogive
U-Shape
Bell Shape
The distribution is
U-Shape
Reversed J-Shape
Bell shape
Undefined in shape
The distribution is
Right-Skewed
Left-Skewed
Has no skew
The distribution is
Unimodal
Bimodal
Multimodal
Has no mode
The distribution is
U-Shape
Reversed J-Shape
Bell shape
Undefined in shape
The distribution is
Right-Skewed
Left-Skewed
Has no skew
The distribution is
Unimodal
Bimodal
Multimodal
Has no mode
The distribution is
U-Shape
Reversed J-Shape
Bell shape
Undefined in shape
The distribution is
Right-Skewed
Left-Skewed
Has no skew
The distribution is
Unimodal
Bimodal
Multimodal
Has no mode
A bell-shaped distribution has no skewness.
Sometimes True
Always True
Never True
A left-skewed distribution is unimodal.
Sometimes True
Always True
Never True
In how many games did the team score more than 20 points?
(a)
What is the shape of the distribution?
J-Shaped
Bell-Shaped
U-Shaped
Uniform
In how many games did the team score fewer than 10 points?
(a)
In a dot plot, each dot represents _____________.
a variable
frequency
the mean
the mode
The dot plot shown describes the number and types of pizzas ordered for a party. By analyzing the dot plot, determine how many pizzas were ordered for the party.
(a)
How many games did the team play?
(a)
A dotplot is not advisable to use for _______________.
small sets of data
quantitative data
large sets of data
qualitative data
The dot plot shown describes the number of children each family in a particular apartment complex has.
What is the median number of children in this apartment complex? round off answer in whole number
(a)
A survey was taken in an apartment complex to determine how many computers each family owns. A dot plot was made with the results.
This dotplot displays a right skew.
True
False
A survey was taken in an apartment complex to determine how many computers each family owns. A dot plot was made with the results.
This shows that most families in the apartment complex have between 1 and 3 computers.
True
False
A survey was taken in an apartment complex to determine how many computers each family owns. A dot plot was made with the results.
This dotplot is bell-shaped and unimodal.
True
False
Given the data below about football scores, compute the following: round off answers in whole number
a) range
b) mean
c) median
(a)
A study was conducted to determine the effectiveness of a speed limit sign.
The speeds of cars at the 65 mph sign were:
58 60 65 65 70 70 71 74 85 88
Identify the five number summary.
a) minimum value
b) Q1
c) median
d) Q3
e) maximum value
(a)
A study was conducted to determine the effectiveness of a speed limit sign.
The speeds of cars at the 65 mph sign were:
58 60 65 65 70 70 71 74 85 88
Which box plot correctly displays the information?
B
C
A
D
A study was conducted to determine the effectiveness of a speed limit sign.
The speeds of cars at the 65 mph sign were:
58 60 65 65 70 70 71 74 85 88
Determine the values of the outlier:
a) any values that are less than _____ are extremely low values
b) any values that are greater than _____ are extremely high values.
(a)
Find the following. Round off answers to the nearest tenths.
Ages of 6th grade Teachers
a) range
b) mean
c) median
d) mode
(a)
Find the following. Round off answers to the nearest tenths.
Ages of 5th grade Teachers
a) range
b) mean
c) median
d) mode
(a)
The range of each attempt is the same.
True
False
Attempt 1 average score was higher than attempt 2 scores.
True
False
Use the dot plot shown to find the following. Round off answers to the nearest tenths.
a) range
b) mean
c) median
d) mode
(a)
The boxplots below show prices of used cars (in thousand of dollars) advertised for sale at three different car dealers.
a) Which dealer offers the cheapest car
b) what price (include unit)?
(a)
The boxplots below show prices of used cars (in thousand of dollars) advertised for sale at three different car dealers.
a) Which dealer offers the lowest median price
b) how much is it (include unit)?
(a)
The boxplots below show prices of used cars (in thousand of dollars) advertised for sale at three different car dealers.
a) Which dealer has the smallest price range
b) what is it (include unit)?
(a)
The boxplots below show prices of used cars (in thousand of dollars) advertised for sale at three different car dealers.
a) Which dealer's prices are less variable
b) what is it (include unit)?
(a)
If the range of a data set is 25. Find the approximated value of the standard deviation, using the range rule of thumb. Round off answers to the nearest hundredths.
(a)
If the values of the mean, median and mode will all be the same, the shape of the distribution will be _______.
Bell Shaped
Left-Skewed
Cannot be determined
Right-Skewed
What is the appropriate measure for the data that represent the marital status (married, divorced, widowed, single)?
Mean
Median
Mode
Cannot be determined
Which is true about coefficient of variation?
The difference between the largest and lowest value of a set of data.
A measure of variation used when data sets have different units.
The middle value of a set of data.
The squared value of the standard deviation.
If the CVar for an English test is 4.9%, and the CVar for a History test is 6.9%, then the History test is more consistent.
True
False
If the mean of the number of sales of houses is 56, and the variance is 36, then the coefficient of variation is (a) . Round off answer to the nearest hundredths.
If the CVar for an English test is 6.9%, and the CVar for a History test is 4.9%, then the English test is more variable.
True
False
If the CVar for an English test is 7.2%, and the CVar for a History test is 5.2%, then the History test is less consistent.
True
False
Select the statement that correctly describes a relationship between measures of central tendency for the distribution above.
None of the choices
The median and the mean are the same
The mean is less than the mode
The mode and the mean are the same
When the distribution is positively skewed, the relationship between the mean, median and mode will be:
Cannot be determined
Mean = Median = Mode
Mean > Median > Mode
Mean < Median < Mode
If all data values are the same in a set, what is the value of its variability?
1
R/4
100%
0
Determine the skewness of the data set below:
1, 2, 2, 3, 3, 3, 4, 4, 5
Right-Skewed
Symmetric
Uniform
Left-Skewed
Determine the distribution of the data set that has a mean = 7, a median = 6.5, and a mode of 6.
Right-Skewed
Symmetric
Uniform
Left-Skewed
The mean is the best measure of central tendency.
True
False
All data have mean, median and mode.
True
False
The median and mean can only have one value for a given data set.
True
False
Which among the following will give you a coefficient of variation of 30%?
Mean of 30 and standard deviation of 15
Mean of 3 and standard deviation of 3
Mean of 10 and standard deviation of 3
Mean of 4 and standard deviation of 16
The median is usually preferred when there is an outlier.
True
False
Determine the distribution of the data set that has a mean = 5, a median = 5, and a mode of 5.
Right-Skewed
Symmetric
Uniform
Left-Skewed
What is the coefficient of variation of a sample that has a mean of 10 and standard deviation of 2?
20
2%
20%
2
