According to Business Week, Maternity Chic, a purveyor of designer maternity wear, sells dresses and pants priced around $150 each for an average total sale of $1,200. The total sale has a normal distribution with a standard deviation of $350. What is the probability that a randomly selected customer will have a total sale of less than $1,151? Use only the appropriate formula and/or statistical table in your textbook to answer this question. Report your answer to 4 decimal places, using conventional rounding rules.

Question

Babyplier · Answer

Number one, what formula is given in your textbook?

Mercury · Answer

you are given mean and standard deviation, so calculate the z-score for 1151, then find the associated probability using a calculator/z-table