The lower limit of the confidence interval is x - E Almost equal to 316.059 gram

Question

The lower limit of the confidence interval is x - E Almost equal to 316.059 grams and the upper limit is Y + E Almost equal to 348.741 grams. As usual, we round to one more decimal place than the given data in our final answer. we are 99% confident that the mean weight for all the red squirrels in Percentile Park is between 316.06 grams and 348.74 grams. Find the critical value t_Alpha/2 for each of the following combinations of confidence level and sample size. 95% confidence, n = 20 90% confidence, n = 47 99% confidence, n = 34 98% confidence, n = 66

Explanation / Answer

WITH THE DF AS N-1 AND CONFIDENCE LEVEL WE LOOK AT THE T TABLES TO ANSWER THE QUESTION:

a.+/- 2.093
b.+/- 1.679
c.+/- 2.733
d.+/- 2.385

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