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Question 1 of 20
1.0/ 1.0 Points
A variable is classified as ordinal if:
A.we track the variable through a period of time B.the data arise from continuous measurements C.there is a natural ordering of categories D.there is no natural ordering of categories
Question 2 of 20
1.0/ 1.0 Points
Which of the following indicates how many observations fall into various categories?
A.The sample table B.The tabulation scale C.The frequency table D.TheLikert scale
Answer Key Question 3 of 20
1.0/ 1.0 Points
Find the z-score for each student and indicate which one has a better relative position. An Art Major earned a grade of 46 on an exam with = 50 and s = 5; A Theater Major earned a grade of 70 on an exam with = 75 and s = 7.
A.The art major has a higher relative position than the theater major. B.Both students have the same score. C.Thetheater major has a higher relative position than the art major. D.The higher score cannot be determined.
Answer Ke Question 4 of 20
1.0/ 1.0 Points
Which of the following is the graphical analog of a frequency table?
A.The scatterplot B.The time series plot C.The histogram D.The contingency table
Ans Question 5 of 20
1.0/ 1.0 Points
Which of the following are the three most common measures of central location?
A.Mean, variance, and standard deviation B.Mean, median, and mode C.Mean, median, and variance D.Mean, median, and standard deviation
Question 6 of 20
1.0/ 1.0 Points
Suppose that a histogram of a data set is approximately symmetric and "bell shaped". Approximately, what percent of the observations are within three standard deviations of the mean?
A.95% B.99.7% C.50% D.68%
A Question 7 of 20
0.0/ 1.0 Points
What type of sampling is being employed if the population is divided into economic classes and a sample is chosen from each economic class to be surveyed?
A.cluster sampling B.systematic sampling C.stratified sampling D.random sampling
Question 8 of 20
1.0/ 1.0 Points
The length of the box in the boxplot portrays the
A.interquartile range B.median C.mean D.range
Answer Ke Question 9 of 20
1.0/ 1.0 Points
What kind of relationship between x and y is demonstrated by the scatter plot below?
A.A positive linear relationship B.No linear relationship C.This is not a scatter plot D.A negative linear relationship
Answer K Question 10 of 20
1.0/ 1.0 Points
A population includes:
A.only households B.all objects of interest in a particular study C.only machines D.only people
Answer Question 11 of 20
1.0/ 1.0 Points
Suppose that a histogram of a data set is approximately symmetric and "bell shaped". Approximately what percent of the observations are within one standard deviation of the mean?
A.99.7% B.68% C.95% D.50%
Question 12 of 20
1.0/ 1.0 Points
The difference between the first and third quartile is called the
A.mid range B.interquartile range C.unimodal range D.interdependent range
Answe Part 2 of 3 -
2.0/ 6.0 Points
Part 3 of 3 -
1.0/ 2.0 Points