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?

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.3: Special Probability Density Functions
Problem 7E
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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?
Transcribed Image Text: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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