* 86% 8:16 PM wamap.org .ill AT&T; auulls use computers al nome, was noursvve wo
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* 86% 8:16 PM wamap.org .ill AT&T; auulls use computers al nome, was noursvve would like to test (at the usual significance level of 5%) whether the current study provides significant evidence that this mean has changed since the previous year. Using a 95% confidence interval of (7.7, 9.3), our conclusion is that: Othe current study does provide significant evidence that the mean number of weekly hours has changed over the past year, since 8 falls outside the confidence interval Othe current study does not provide significant evidence that the mean number of weekly hours has changed over the past year, since 8 falls outside the confidence interval 0 the current study does provide significant evidence that the mean number of weekly hours has changed over the past year, since 8 falls inside the confidence interval 0 the current study does not provide significant evidence that the mean number of weekly hours has changed over the past year, since 8 falls inside the confidence interval. ONone of the above. The only way to reach a conclusion is by finding the p-value of the test.Explanation / Answer
The confidence interval does not cantain 0, and hence we will be rejecting the null hypothesis.
Therefore the 3rd Option is the correct answer. the study does provide significant evidence that the mean number of weekly hours has changed over the past year, since 8 falls inside the confidence interval.
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