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A research firm conducted a survey to determine the mean amount steady smokers spend on cigarettes...

A research firm conducted a survey to determine the mean amount steady smokers spend on cigarettes during a week. They found the distribution of amounts spent per week followed the normal distribution with a standard deviation of $4. A sample of 64 steady smokers revealed that the mean is $25?

What is the 99% confidence interval estimate of µ?

Interpret the confidence interval you constructed above.

Math   Statistics-And-Probability   
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