Author Question: A recent survey found that 71 of all adults over 50 wear sunglasses for driving. In a random sample ... (Read 124 times)

panfilo · **on:** Jul 25, 2018

A recent survey found that 71 of all adults over 50 wear sunglasses for driving. In a random sample of 60 adults over 50, what is the mean and standard deviation of those that wear sunglasses?

A) mean: 42.6; standard deviation: 3.51482574 B) mean: 17.4; standard deviation: 3.51482574
C) mean: 17.4; standard deviation: 6.52686755 D) mean: 42.6; standard deviation: 6.52686755

Question 2

n = 183, x = 158; 95 level

A) 0.813 to 0.914 B) 0.824 to 0.903 C) 0.814 to 0.913 D) 0.823 to 0.904