Question

(2 points) 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 take the final exam. Their scores are shown in the table below. Person ABCDEFGHIJ Test Score 86 91 70 68 95 76 83 97 89 74 Use a 0.05 significance level to test the claim that people do better with the new edition. Assume the standard deviation is 10.9. (Note: You may wish to use statistical software.) (a) What kind of test should be used? A. Two-Tailed B. One-Tailed C. It does not matter. (b) The test statistic is 2.29 (rounded to 2 decimals). (C) The P-value is 0.023887 (d) Is there sufficient evidence to support the claim that people do better than 75 on this exam? A. No B. Yes (e) Construct a 95% confidence interval for the mean score for students using the new text. 64.1 <u< 85.9

I can't seem to get the P value or the 95% CI

Answer 1

10.31t1 り= 10, = g2.9, failed Answer t B Ce btest statitic :t=X-4 82-9-45 (0+3941//10 2 40 G PUalue u 0.019949 d Andoees B,Yet 951 Cntedue alau t2-262x) 2-262 x 10-3 941 5.46 90.34) 5.5, 90.3) t5.5 L42190 3 Le