Suppose that the mean retail price per gallon of regular grade gasoline in the United States is $3.49 with a standard deviation of $0.20 and that the retail price per gallon has a bell-shaped distribution. (a) What percentage of regular grade gasoline sold between $3.29 and $3.69 per gallon?  % (b) What percentage of regular grade gasoline sold between $3.29 and $3.89 per gallon?  % (c) What percentage of regular grade gasoline sold for more than $3.89 per gallon?

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.