Question

Suppose a marketing professor randomly selects 3 new teaching assistants from a total of 14 applicants...

Suppose a marketing professor randomly selects 3 new teaching assistants from a total of 14 applicants - 8 male and 6 female applicants. Let X be the number of females who are hired. Answer all questions to 3 decimal places.

What is the probability that number of female applicants hired is 3? 0.055

上面显示的是正确答案。 错误. Tries 5/5 以前的尝试

What is the expected number of females hired?

错误. Tries 1/5 以前的尝试

What is the standard deviation of number of females hired?

Tries 0/5
Math   Statistics-And-Probability   
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Homework Answers

Answer #1

a) There is a total of 14 applicants

Total number of ways to select 3 teaching assistant from 14 is

Total number of ways to select 3 from 6 female applicant =

The probability that number of female applicants hired is 3 =

b) PDF of the number of female hired is

X P(X)
0
1
2
3 0.0549

the expected number of females hired

Standard deviation of number of females hired =

Standard deviation of number of females hired =

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