A publishing company has just published a new college textbook. Before the company decides the price at which to sell this textbook, it wants to know the mean price of similar textbooks on the market. The research department at the company took a random sample of 22 comparable textbooks, this sample showed a mean price of $123.75. It is known that the standard deviation of the prices of all such textbooks is $11.50 and comes from a normally distributed population. Construct a 90% confidence interval for the mean price of similar college textbooks. (118.94, 128.56) O(123.2, 124.3) O(119.72, 127.78) (118.65, 128.85)

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