Question

The amounts of electricity bills for all households in a city have a skewed probability distribution
with a mean of $140 and a standard deviation of $30. Find the probability that the mean amount of electric bills for a random sample of 75 households selected from this city will be
a. between $132 and $136
b. within $6 of the population mean
c. more than the population mean by at least $4

Answer 1

Answer:

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