Question

A sample of 400 observations taken from a population produced sample mean equal to 92.45 and...

A sample of 400 observations taken from a population produced sample mean equal to 92.45 and a standard deviation of 12.20. Make a 95% confident interval for μ.

Instructions:

Draw the normal curve and shade the area where applicable

Do not give calculator key strokes. (Give the formula used)

Circle your answer to the question.

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