The table shows Kevin's earnings for eight weeks. Week Number Earnings (dollars) 1 30 1 2 15 3 20 4 35.50 520.50 6 25 20 8 9.50 Which histogram displays his earnings appropriately? Frequency ONW 10-19.99 0-9.99 20-29.99 30 - 39.99 Money Earned (dollars) Frequency ONWA 0-10 10 - 2020 - 30 30-40

answer: the answer is ann

49%

step-by-step explanation:

when you realize that you dont know just realize i just took a test and im so smart

irst, find the z score of a score of 80. this is given by the formula z = (x-u)/o, where x is the score, u is the mean, and o is the standard deviation. this gives

z = (80-78)/12 = 1/6 = .1667

now, find what percentile a z score of 1/6 correlates to in the normal distribution.

a z score of 1/6 = .1667 is equivalent to the 56.36th percentile of the distribution. so the probability a score is over this is 1-.5636 = .4364

the mean of a sample mean is equal to the original mean. however, the standard deviation of a sample mean is equal to the original standard deviation divided by the square root of n (sample size). so the new standard deviation is 12/sqrt(16) = 3.

the new z score is 80-78/3 = 2/3 = .667. this is equivalent to the 74.86th percentile. so the probability that the mean will be greater than this score is 1-.7486 = .2514.