Suppose that a manager is interested in estimating the average amount of money customers spend in her store. after sampling 36 transactions at random, she found that the average amount spent was $35.25. she then computed a 95% confidence interval to be between $31.84 and $38.66. which statement gives a valid interpretation of the interval?

a. the store manager is 95% confident that the average amount spent by the 36 sampled customers is between s31.84 and $38.66.
b. there is a 95% chance that the mean amount spent by all customers is between $31.84 and $38.66.
c. there is a 95% chance that a randomly selected customer will spend between $31.84 and $38.66.
d. the store manager is 95% confident that the average amount spent by all customers is between $31.84 and s3866