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The random sample shown below was selected from a normal distribution. 8, 5, 8, 5, 6,...

The random sample shown below was selected from a normal distribution.

8, 5, 8, 5, 6, 4

A) Construct a 90% confidence interval for the population mean π

( ___ , ___ ) *Round to two decimal places as needed.

B) Assume that sample mean x̄ and sample standard deviation s remain exactly the same as those you just calculated but that are based on a sample of n = 25 observations. Repeat part "A"

The confidence interval is ( ___ , ___ ) *Round two decimal places as needed

Math   Statistics-And-Probability   
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