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A software developer wants to know how many new computer games people buy each year. A...

A software developer wants to know how many new computer games people buy each year. A sample of 271 people was taken to study their purchasing habits. Construct the 90% confidence interval for the mean number of computer games purchased each year if the sample mean was found to be 6.3. Assume that the population standard deviation is 1.2. Round your answers to one decimal place.

Lower End Point _______________

Upper End Point _______________

Math   Statistics-And-Probability   
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Lower end point 6.2

Upper end point 6.4

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