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Suppose the average age for registered voters is = 39.60 years... Suppose the average age for registered voters is = 39.60 years with = 11.60

Suppose the average age for registered voters is = 39.60 years...

Suppose the average age for registered voters is = 39.60 years with = 11.60 years, and that the distribution of ages is normal. During a recent jury trial, a statistician noticed that the average age of the 12 jurors was 50.34years.

a) How likely is it to obtain a jury this old or older by chance?

b) Is it reasonable to conclude that this jury is nota random sample of registered voters?

include full explanation please

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