# Confidence Interval

Using the following information, construct a 90% confidence interval for (:1 - :2).

Sample 1: n = 8 mean = 151 standard deviation = 31

Sample 2: n=21 mean = 130 standard deviation = 72

please show results of all steps in the process.

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Description Confidence Interval

Posting Using the following information, construct a 90% confidence interval for (:1 - :2).

Sample 1: n = 8 mean = 151 standard deviation = 31

Sample 2: n=21 mean = 130 standard deviation = 72

please show results of all steps in the process.

Sample 1 (for 90% confidence interval):

1. Calculate the estimated standard error of the mean ...

#### Solution Summary

The solution constructs a 90% confidence interval for (:1 - :2).

Sample 1: n = 8 mean = 151 standard deviation = 31

Sample 2: n=21 mean = 130 standard deviation = 72