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In: Statistics and Probability

A telephone company claims the average number of phone calls made every day in a household...

A telephone company claims the average number of phone calls made every day in a household is more than three. A random sample of 169 days is survey in a mean of two and a standard deviation of .2 are found, test the claim at a 5% level of significance. Assume the district distribution is normal.

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Expert Solution

Let denotes the average number of phone calls made every day in a household.

orchestra answered 2 years ago
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