Question: Consider a designed study focused on estimation of the POPULATION AVERAGE commute time based on independent sample. Individual records are normal, with the population standard

Consider a designed study focused on estimation of the POPULATION AVERAGE commute time based on independent sample. Individual records are normal, with the population standard deviation == 10 minutes. The goal is to estimate the target withC= 90% confidence in such a way that the WIDTH of this interval will not exceed 6 minutes.

1. Specify the critical value you are going to use

2. Determine the SMALLEST SAMPLE SIZE needed for your designed study 3. Find the width of a 90% confidence interval based on a sample of sizen= 25.

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3. How much information do we need to collect?

2. What types of information are we collecting?

5. How quickly can we manage to collect the information?