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 $41.15. She then computed a 90% confidence interval to be between $38.01 and $44.29.

Which statement gives a valid interpretation of the interval?

There is a 90% chance that a randomly selected customer will spend between $38.01and$44.29.

There is a 90% chance that the mean amount spent by all customers is between $38.01and$44.29.

The store manager is 90% confident that the average amount spent by all customers is between $38.01 and$44.29.

The store manager is 90% confident that the average amount spent by the 36 sampled customers is between $38.01and$44.29.