Solution Found!
Section I: Multiple Choice Choose the best answer for Questions AP1.1 to AP1.14. A large
Chapter 4, Problem AP1.3(choose chapter or problem)
A large set of test scores has mean 60 and standard deviation 18. If each score is doubled, and then 5 is subtracted from the result, the mean and standard deviation of the new scores are
(a) mean 115; std. dev. 31. (d) mean 120; std. dev. 31.
(b) mean 115; std. dev. 36. (e) mean 120; std. dev. 36.
(c) mean 120; std. dev. 6.
Questions & Answers
QUESTION:
A large set of test scores has mean 60 and standard deviation 18. If each score is doubled, and then 5 is subtracted from the result, the mean and standard deviation of the new scores are
(a) mean 115; std. dev. 31. (d) mean 120; std. dev. 31.
(b) mean 115; std. dev. 36. (e) mean 120; std. dev. 36.
(c) mean 120; std. dev. 6.
ANSWER:Step 1 of 2
Given
Standard deviation
All scores are doubled and decreased by