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WorksheetsDiagnostic Test - August 26, 2021
Total questions: 20
Worksheet time: 7mins
What do you call a numerical value used as a summary measure for a sample, such as sample mean?
population parameter
sample parameter
sample statistic
population mean
Life of a battery is a
discrete variable
continuous variable
qualitative variable
categorical variable
In statistics, a population consists of
all People living in a country
all People living in the are under study
all subjects or objects whose characteristics are being studied
all people studying in a state university
The members of each basketball team wear numbers on their jerseys. What scale of measurement are these umbers considered?
Nominal
Ordinal
Interval
Ratio
Ashken wants to see if any of his classmates would like to see a new movie. He asks the first ten students that walk into class. What sampling method is this?
Cluster
Convenience
Volunteer
Simple Random
A marketing researcher is restricted to a sample size of 100, but wants households with children and those without children equally represented. The sampling method he would use is:
systematic
replicated
quota
cluster
Frequency distributions can be helpful means of organizing and summarizing quantitative data. What type of graph is usually used to accompany such data?
histogram
time series
time series
scatter diagram
A pie graph is not useful in showing which of the following characteristics of a data set?
categories that make up the smallest proportions of the total
frequency changes over time
categories that make up the largest proportions of the total
relative frequencies for each category in the distribution
Which measure of central tendency is obtained by calculating the sum of values and dividing this figure by the number of values there are in the data set?
Median
Mean
Mode
Midrange
What type of distribution is observed when most of the scores cluster around the lower end of the scale?
normal distribution
bimodal distribution
negatively skewed distribution
positively skewed distribution
Which of the following measures of central tendency can have more than one value in a single sample?
mean
median
midrange
mode
What is used to compare the variation or dispersion in two or more sets of data even though they are measured in different units?
range
standard deviation
coefficient of variation
mean deviation
What is the total under the curve of a normal distribution?
equal to one
less than one
more than one
between -1 and +1
Null and alternative hypotheses are statements about
population parameters.
sample parameters.
sample statistics.
it depends - sometimes population parameters and sometimes sample statistics.
The region of rejection for a one-tailed test is
always greater than that for a two-tailed test.
found in the tail that supports the alternative hypothesis.
always greater than 0.05.
found in the tail that supports the null hypothesis.
An independent t-test can be used to assess which of the following?
It assesses how many factors there are in questionnaire data
It assesses relationships between two interval data sets
It assesses differences between two groups of participants
It assesses differences between scores obtained on two separate occasions from the same participants
A repeated measures t-test can be used to assess which of the following?
It assesses differences between scores obtained on two separate occasions from the same participants.
It assesses relationships between two ratio data sets
It assesses differences between two groups of participants
It assesses how many factors there are in questionnaire data
When the correlation coefficient, r, is close to one:
there is no relationship between the two variables
there is a strong linear relationship between the two variables
it is impossible to tell if there is a relationship between the two variables
the slope of the regression line will be close to one
What does the intercept in linear regression represent?
the strength of the relationship between x and y
the expected x value when y is zero
the expected y value when x is zero
a population parameter
How many independent and dependent variables are there in a One-Way ANOVA?
3 independent variables and 2 dependent variables
2 independent variables and 1 dependent variable
1 independent variable and 1 dependent variable
1 independent variable and 2 dependent variables
