A survey claims that the % of customers who favor Cheerios cereal over Fruit Loops cereal is likely between 78.01% and 45.99%. How many people were surveyed?

Question

Choices: 1)62 2)10 3) 39 4) 32

Answer 1

CI = about 46 to 78% = 124/2 % = 62% average = mean

62 -46 = 16 = half the range from min to mean or mean to max

it's a binomial distribution either you favor one or the other

mean = np = .62n where n=number sampled/surveyed

(.62)(n) = 62

n = 100