A sample consists of 75 TV sets purchased several years ago. The replacement times of those...

A sample consists of 75 TV sets purchased several years ago. The replacement times of those TV sets have a mean of 8.2 years. Assume σ= 1.1 years. Find the 95% confidence interval.
Why are you finding a confidence interval for Question 1?
A random sample of 61 Foreign Language movies made in the last 10 years has a mean length of 135.7 minutes with a standard deviation of 13.7 minutes. Construct a 95% confidence interval.
For items 1 and 3, you are constructing a confidence interval. What is the critical difference in the construction of those intervals?

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orchestra answered 1 year ago

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