The probability that a...

Question

The probability that a women is widowed or divorced is 0.65. 29 women are interviewed at random. X can be defined as number of women who are widowed or divorced. Find the standard deviation.

Answer 1

Shelby,

 

Since you're sampling from a large population the random variable can be considered to be binomial.

 

In this case p=.65 so (q = .35) and n= 29. The formulas are μ = np and σ = √npq.

 

Just plug in the numbers. You can use these formulas for your other question also.

 

 

 

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