You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p = 0.9. You would like to be 96% confident that your esimate is within 2.5% of the true population proportion. How large of a sample size is required?

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.

i am thinking c. sorry if im wrong .

step-by-step explanation:

the expected value of the random variable : 0, 1 and 2

step-by-step explanation: