t Discussions Assignments My Tools, Resources, Classlist Help? Lisa Hunt: Attemp

Question

t Discussions Assignments My Tools, Resources, Classlist Help? Lisa Hunt: Attempt 1 True False Question 6(5 points) When testing a method of gender selection prior to childbirth, we assume that the rate of female births is 50%, and we reject that assumption if we get results that are unusual in the sense that they are very unlikely to occur with a normal 50% birth rate. Assuming a 50% rate of female births, find the standard deviation of the number of girls in 15 births. 3.75 1.94 3.75 19.36 ??? 41) 3 4 5 6 0

Explanation / Answer

Given :-

p = P(female birth) = 50% = 0.50

And n=15

So, We have to Binomial distribution with mean (u= np) and standard deviation (sigma = ?np(1-p) )

Now we have to find standard deviation of of girl or female

sigma = ?15*0.50*(1-0.50) = 1.94

Answer :- second option is correct.

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