Question

Google Apple Dive Outook Blackboard Astronomy 01 YouTube Entertainment Social News 2,Spring.2019:ChSec2:1 At least one of the answers above is NOT correct (1 point) A study is conducted to determine if a newly designed text book is more helpful to learning the material than the old edition. The mean score on the final exam for a course using the old edition is 75. Ten randomly selected people who used the new text took the final exam. Their scores are shown in the table below Person ABCDEFGHIJ Test Score 73 95 86 82 88 70 79 68 9 79 Use a 0.01 significance level to test the cliaim that people do better with the new edition. Assume that the scores are normally distributed and that the population standard deviation is 10.7 (a) What kind of test should be used? O A One-Tailed B. Two-Tailed C. IR does not matter. b) The test statistic is 2.49 rounded to 2 decimals) )The P-value is .0064 (d) Is there sufficient evidence to support the claim that people do better than 75 on this exam? A. No OB.Yes (a) Construct a 99% confdencenterval for the mean soon for students using the new text 74.9465 <μ<191,707 Note: You can eam partial credit on this problem Preview My Answers Submit Answers Your score was recorded. 8 0 0

Answer 1

a-

two tailed test

b-