A recent survey found that 76 % of all adults over 50 wear glasses for driving. in a random sample of 100 adults over 50, what

Question

3 years ago

9

A recent survey found that 76 % of all adults over 50 wear glasses for driving. in a random sample of 100 adults over 50, what

is the mean and standard deviation of those that wear glasses? round the answers to the nearest hundredth.
a. mean: 24.00 ; standard deviation: 4.27
b. mean: 76.00 ; standard deviation: 8.72
c. mean: 24.00 ; standard deviation: 8.72
d. mean: 76.00 ; standard deviation: 4.27

Mathematics

1 answer:

Mandarinka [93] · Answer 1 · 2022-06-16T19:40:05+03:00

Mandarinka [93]3 years ago

7 0

Mean = np = 60(0.7) = 42

Standard deviation = sqrt(npq) = sqrt(60(0.7)(0.3)) = 3.55

A recent survey found that 76 ​% of all adults over 50 wear glasses for driving. in a random sample of 100 adults over​ 50, what

A recent survey found that 76 % of all adults over 50 wear glasses for driving. in a random sample of 100 adults over 50, what