A major oil company would like to improve its tarnished image following a large oil spill. Is marketing department develops a short television commercial and tests in on a sample of n=7 participants. People's attitudes about the company are measured with a short questionnaire, both before and after viewing the commercial. The data are as follows: Person Before After A 15 15 B 11 13 C 10 18 D 11 12 E 14 16 F 10 10 G 11 19 Test where there was a significant difference in views before and after viewing the commercial at alpha = .01. Provide each of the following in your answer. a) State the null and alternative hypotheses for this problem situation. Use correct notation. b) Compute the test statistic c) List the critical value(s) and make a decision by comparing the test statistic to the critical value(s). d) List the p-value and make a decision by comparing the p-value to alpha. e) In 1-2 complete sentences, state the conclusion of this test in the context of the problem situation.
A major oil company would like to improve its tarnished image following a large oil spill. Is marketing department develops a short television commercial and tests in on a sample of n=7 participants. People's attitudes about the company are measured with a short questionnaire, both before and after viewing the commercial. The data are as follows:
| Person | Before | After |
| A | 15 | 15 |
| B | 11 | 13 |
| C | 10 | 18 |
| D | 11 | 12 |
| E | 14 | 16 |
| F | 10 | 10 |
| G | 11 | 19 |
Test where there was a significant difference in views before and after viewing the commercial at alpha = .01.
Provide each of the following in your answer.
a) State the null and alternative hypotheses for this problem situation. Use correct notation.
b) Compute the test statistic
c) List the critical value(s) and make a decision by comparing the test statistic to the critical value(s).
d) List the p-value and make a decision by comparing the p-value to alpha.
e) In 1-2 complete sentences, state the conclusion of this test in the context of the problem situation.
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