MATH 302 EXAM QUESTIONS AND ANSWERS

MATH 302 EXAM QUESTIONS AND ANSWERS Question 1 of 20 1.0/ 1.0 Points A sample of 20 observations has a standard deviation of 4. The sum of the squared deviations from the sample mean is: A. 28 8 B. 30 4 C. 32 0 D. 40 0 Answer Key: B Question 2 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 two standard deviations of the mean? A. 95 % B. 68 % C. 50 % D. 99. 7% Answer Key: A Question 3 of 20 1.0/ 1.0 Points Which of the following statements is true regarding the data set 10, 10, 10, 10, and 10? A. The range is zero B. The standard deviation equals zero C. The interquarti le range equals zero D. all of the above Answer Key: D Question 4 of 20 1.0/ 1.0 Points Given the following boxplot where m is the median value, what statement could be made about the distribution of the data?