mth302 quiz 1.docx - Question 1 of 20 1.0 1.0 Points...

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Question 1 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. 95% B. 68% C. 50% D. 99.7% Answer Key: B Question 2 of 20 1.0/ 1.0 Points The median can also be described as: A. the middle observation when the data values are arranged in ascending orde B. the second quartile C. the 50th percentile D. all of the above Answer Key: D Question 3 of 20 1.0/ 1.0 Points Which of the following statements is true for the following data values: 7, 5, 6, 4, 7, 8, and 12? A. Only the mean and median are equal B. Only the median and mode are equal C. The mean, median and mode are all equal D. Only the mean and mode are equal
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Answer Key: C Question 4 of 20 0.0/ 1.0 Points An advertisement for a car states that it is 10% more powerful than its competitor. This is an example of A. suspect samples B. ambiguous averages C. detached statistics D. changing the subject Answer Key: C Question 5 of 20 1.0/ 1.0 Points If a variable has possible values –2, 6, and 17, then this variable is A. both a continuous and a discrete variable B. neither a continuous nor a discrete variable C. a continuous variable D. a discrete variable Answer Key: D Question 6 of 20 1.0/ 1.0 Points The length of the box in the boxplot portrays the A. mean
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B. range C. interquartile range D. median Answer Key: C Question 7 of 20 1.0/ 1.0 Points A time series plot is essentially a: A. histogram B. Scatterplot C. figure D. diagram Answer Key: B Question 8 of 20 1.0/ 1.0 Points
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