Stats Practice Test Exam Questions And Answers ( Verified And Updated )

Stats Practice Test Exam Questions And Answers ( Verified And Updated ) If one wanted to calculate summary statistics for salaries at a large company where there are many people with modest salaries and a few with very high salaries, which would be the most appropriate measures of center and spread? a. median and IQR b. Mean and IQR c. Mode and Range d. Mean and Standard Deviation - answera Mr. Jones' class of 32 students had a mean score of 72.4% while Mr. Roberts' class of 29 students had a mean score of 63.4%. What is the mean score of these two classes? a. 63% b. 67.5% c. 67.9% d. 68.1 e. 72.4% - answerd After the times were calculated at a recent cross-country race, it was discovered that the timers started their watches 3 minutes after the gun was shot for the start. If the mean time for the runners was 21.2 minutes and the standard deviation was 2.1 minutes, what would the new measurements be after adjusting the times? a. cannot be determined without knowing how many runners there were b. mean = 21.2, S = 5.1 c. mean = 24.2, S = 5.1