A grocery store's receipts show that Sunday customer purchases have a skewed distribution with a mean of $30 and a standard deviation of $20. Suppose the store had 309 customers this Sunday. a) Estimate the probability that the store's revenues were at least $9,800. b) If, on a typical Sunday, the store serves 309 customers, how much does the store take in on the worst 1% of such days? a) The probability is (Round to four decimal places as needed.)

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A grocery store's receipts show that Sunday customer purchases have a skewed distribution with a mean of $30 and a standard deviation of $20.
Suppose the store had 309 customers this Sunday.
a) Estimate the probability that the store's revenues were at least $9,800.
b) If, on a typical Sunday, the store serves 309 customers, how much does the store take in on the worst 1% of such days?
a) The probability is .
(Round to four decimal places as needed.)
Enter your answer in the answer box and then click Check Anruor
Transcribed Image Text:A grocery store's receipts show that Sunday customer purchases have a skewed distribution with a mean of $30 and a standard deviation of $20. Suppose the store had 309 customers this Sunday. a) Estimate the probability that the store's revenues were at least $9,800. b) If, on a typical Sunday, the store serves 309 customers, how much does the store take in on the worst 1% of such days? a) The probability is . (Round to four decimal places as needed.) Enter your answer in the answer box and then click Check Anruor
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