(Answered) The amounts of electric bills for all households in a city

Statistics

The amounts of electric bills for all households in a city have an approximately normal distribution with a mean of $110 and a standard deviation of $20. Let x-bar be the mean amount of electric bills for a random sample of 16 households selected from the city.

(a) Compute the mean, of x-bar.

$______

(b) Compute the standard deviation, of x-bar.

$______

(c) Comment on the shape of the sampling distribution of x-bar:

Uniform, normal, or hypergeometric

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