In a random sample of 12 residents of the state of Montana the mean waste recycl

Question

In a random sample of 12 residents of the state of Montana the mean waste recycled per person per day was 2.2 pounds with a standard deviation of 0.84 pounds. Determine the 90% confidence interval for the mean waste recycled per person per day for the population of Montana. Find the critical value that should be used in constructing the confidence interval. Construct the 90% confidence interval. Round your amswer one decimal place. In a random sample of 12 residents of the state of Montana the mean waste recycled per person per day was 2.2 pounds with a standard deviation of 0.84 pounds. Determine the 90% confidence interval for the mean waste recycled per person per day for the population of Montana. Find the critical value that should be used in constructing the confidence interval. Construct the 90% confidence interval. Round your amswer one decimal place.

Explanation / Answer

Determine the 90% confidence interval for the mean waste recycled per person per day for the population of Montana. Find the critical value that should be used in constructing the confidence interval.

alpha / 2 = 0.05 df = 11 t = 1.796

I: 2.2 +/- 1.796 * 0.84 / srqt12

2.2 +/- 0.4355

1.7645 < miu < 2.6355

round to 1 decima place

1.8 < miu < 2.6

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