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Probability : Confidence Interval

After reviewing 100 drug stores across nation, you discover that a certain prescription drug has an average price of $40 for $20 pills with a standard deviation of $5. Using this information, deduce with 95% accuracy where the national average cost of 20 pills lies.

Solution Preview

average = 40
n = 100
deviation = 5
alpha = 0.05
z(alpha/2) = ...

Solution Summary

A confidence interval is investigated. The response received a rating of "5" from the student who originally posted the question.

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