Question: Use the sample statistics from Exercise 30 and assume the number of households in the sample is 40. (a) Estimate the number of households whose

Use the sample statistics from Exercise 30 and assume the number of households in the sample is 40.
(a) Estimate the number of households whose monthly utility bills are between $54 and $86.
(b) In a sample of 20 additional households, about how many households would you expect to have monthly utility bills between $54 and $86?
Use the Empirical Rule
Exercise 30
The mean monthly utility bill for a sample of households in a city is $70, with a standard deviation of $8. Between what two values do about 95% of the data lie? (Assume the data set has a bell-shaped distribution.)

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