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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 A B C D E F G H I J
Test Score 80 67 73 71 79 96 85 95 91 87

Use α= 0.05 significance level to test the claim that people do better with the new edition.

1. What kind of test should be used?

a. Two-Tailed
b. One-Tailed
c. It does not matter.

2. The test statistic is:______
3. The P-value is:________
4. Is there sufficient evidence to support the claim that people do better than 75 on this exam?

a. Yes
b. No

5. Construct a 95% confidence interval for the mean score for students using the new text.

Answer :

The answers are shown below:

What is test in statistics?

The test statistic tells you how different two or more groups are from the overall population mean, or how different a linear slope is from the slope predicted by a null hypothesis.

Given:

Person           A B C D E F G H I J

Test Score    80 67 73 71 79 96 85 95 91 87

a) The type of test is one- tailed

b) The test statistic is t- test.

t= 83 - 75 / 10.4√10 = 2.58

c) The P- value

p(z > 2.58)= 0. 015

d) NO

e) Mean score of new edition,

= 830/ 10

= 83

Learn more about this concept here:

https://brainly.com/question/11761182

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