To perform: The complete analysis of the provided case using the provided output and draw the conclusion.
Explanation of Solution
Given:
The boxplot and output are:
Formula used:
The formula to compute the t-confidence interval for population mean is:
Calculation:
The null and alternative hypotheses are:
From the provided output, the P -value is less than the significance level (0.05). Thus, the null hypothesis is rejected and it implies that there is enough evidence to agree with the provided claim at 5% significance level.
Here, the degree of freedom is:
The confidence interval using Ti-83 output is:
Thus, the 95% confidence interval is
Since, the above computed confidence interval does not contain 0. There is enough evidence to agree with the provided claim.
Chapter 9 Solutions
The Practice of Statistics for AP - 4th Edition
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