2. The following frequency distribution gives the age distribution of drivers who were at fault in auto accidents during a one-week period in Georgetown. Age (X years) Frequency 18 - 20 2 21 - 30 5 31 - 40 15 41 - 50 20 51 - 60 61 – 70 10 2 a) Find the mean and standard deviation of the age of the drivers. b) What percentage of the drivers are between 35 and 45 years old?

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