Check assumptions before doing computations in any problem
Problem 1
Find the margin of error using the confidence limit values.
Determine the sample size required to have a margin of error of 50 mg with a 95% confidence level.
Problem 2
Problem 3
Assume the sample is a random sample.
Is the Z-interval procedure, the t-interval procedure, or neither appropriate to find a confidence interval for this problem. Justify your choice by showing which assumptions are met or not met.
Problem 4
The assumptions were met for computing a 95% confidence interval for the mean duration of imprisonment, µ, for all East German political prisoners with chronic PTSD. The confidence interval is from 18.8 months to 48.0 months.
Write the interpretation of this 95% confidence interval.
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