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Suppose that you are interested in estimating the average number of miles per gallon of gasoline...

Suppose that you are interested in estimating the average number of miles per gallon of gasoline your car can get. You calculate the miles per gallon for each of the next thirteen times you fill the tank. Suppose that in truth, the values for your car are bell-shaped, with a mean of 20 miles per gallon and a standard deviation of 1. Find the possible sample means you are likely to get based on your sample of thirteen observations. Consider the intervals into which 68%, 95%, and almost all of the potential sample means will fall, using the Empirical Rule. (Round all answers to the nearest thousandth.)

About 68% of possible sample means will be in the range between ___ and ___ .

About 95% of possible sample means will be in the range between ___ and ___ .

About 99.7% of possible sample means will be in the range between ___ and ___ .

math   Statistics-And-Probability   
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Answer #1

Answer

sample standard deviation =

using empirical rule, 68% values lies between  one standard deviation from mean, 95% values lies between two standard deviation from mean and 99.7% values lies between three standard deviation from mean

68% area range calculation

95% area range calculation

99.7% area range calculation

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