The current age (in years) of clerical employees at an insurance claims processing center is normally distributed with mean 38 and SD 6.

Estimate the proportion of individuals who are more than 40 years of age.

0.24

0.50

0.63

0.37

Q17Based on the information from Qn16

Estimate the proportion of individuals who are between 38 and 42 years of age.

0.44

0.25

0.50

0.75

Q18Based on the information from Qn16

If a random sample of 10 individuals were drawn from the above population, then what model can be used to describe the total age of these individuals?

N(380, 1.9)

N(38, 1.9)

N(380, 19)

N(38, 19)

Q19Based on the information from Qn16

What model can be used to describe the distribution of the sample mean of the above sample?

N(380, 1.9)

N(38, 1.9)

N(380, 19)

N(38, 19)

Q20Based on the information from Qn16

If the ages are converted to months (1year = 12 months) then what model would be appropriate for the age of an individual?

N(38, 72)

N(456, 72)

N(38,36)

N(456, 36)