Consider a normal population distribution with the value of σ known. (a) What is the confidence level for the interval x − 2.81σ/√ n ≤ µ ≤ x + 2.81σ/√ n ? (b) What is the confidence level for the interval µ ≤ x + 2.00σ/√ n ? (c) What is the confidence level for the interval µ ≥ x − 1.96σ/√ n? (d) What value of zα/2 in the CI formula gives 99.7% confidence? (e) What value of zα/2 in the CI formula gives 75% confidence? (f) What value of zα would result in a 88% one-sided CI?

amount of oatypop that contains the prize = 40%

amount   of oatypop which doesn't contain the prize = (100-40)=60%

probability that hannah will win a prize

    = s +f s +f f s+ff   f s+ff f f s+ infinity.where f= failure,s= success

=   or 60%

probability that hannah only has to buy 3 or less boxes before getting a prize= (s) and ( f s) and (ff s) and (f f f s)

        = = 87.04 %  

step-by-step explanation:

the equivalent expression are always the hardest ones but you look at the gcf also

step-by-step explanation:

a is the right answer