35 people are randomly selected and the accuracy of their wristwatches is checked, with positive errors representing watches that are ahead of the correct time and negative errors representing watches that are behind the correct time. The 35 values have a mean of 104sec. Assume the population standard deviation is known to be 242sec. Use a 0.02 significance level to test the claim that the population of all watches has a mean of 00sec. Give your test statistic to 3 decimal places, and your P-value to at least 4 decimal places. Hint: Is there a direction specified in the problem statement? What does that tell you about your alternate hypothesis? The test statistic is The P-Value is The final conclusion is A. There is not sufficient evidence to warrant rejection of the claim that the mean is equal to 0 B. There is sufficient evidence to warrant rejection of the claim that the mean is equal to 0
35 people are randomly selected and the accuracy of their wristwatches is checked, with positive errors representing watches that are ahead of the correct time and negative errors representing watches that are behind the correct time. The 35 values have a mean of 104sec. Assume the population standard deviation is known to be 242sec. Use a 0.02 significance level to test the claim that the population of all watches has a mean of 00sec. Give your test statistic to 3 decimal places, and your P-value to at least 4 decimal places. Hint: Is there a direction specified in the problem statement? What does that tell you about your alternate hypothesis?
The test statistic is
The P-Value is
The final conclusion is
A. There is not sufficient evidence to warrant rejection of the claim that the mean is equal to 0
B. There is sufficient evidence to warrant rejection of the claim that the mean is equal to 0
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