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A study found that the mean amount of time cars spent in drive-throughs of a certain fast-food restaurant was 146.9 seconds. Assuming drive-through times are normally distributed with a standard deviation of 31 seconds, complete parts (a) through (d) below. C (a) What is the probability that a randomly selected car will get through the restaurant's drive-through in less than 92 seconds? The probability that a randomly selected car will get through the restaurant's drive-through in less than 92 seconds is (Round to four decimal places as needed.) (b) What is the probability that a randomly selected car will spend more than 192 seconds in the restaurant's drive-through? The probability that a randomly selected car will spend more than 192 seconds in the restaurant's drive-through is (Round to four decimal places as needed.) (c) What proportion of cars spend between 2 and 3 minutes in the restaurant's drive-through? The proportion of cars that spend between 2 and 3 minutes in the restaurant's drive-through is (Round to four decimal places as needed.) (d) Would it be unusual for a car to spend more than 3 minutes in the restaurant's drive-through? Why? The probability that a car spends more than 3 minutes in the restaurant's drive-through is is than 0.05. (Round to four decimal places as needed.) so it be unusual, since the probability

A study found that the mean amount of time cars spent in drive-throughs of a certain fast-food restaurant was 146.9 seconds. Assuming drive-through times are normally distributed with a standard deviation of 31 seconds, complete parts (a) through (d) below. C (a) What is the probability that a randomly selected car will get through the restaurant's drive-through in less than 92 seconds? The probability that a randomly selected car will get through the restaurant's drive-through in less than 92 seconds is (Round to four decimal places as needed.) (b) What is the probability that a randomly selected car will spend more than 192 seconds in the restaurant's drive-through? The probability that a randomly selected car will spend more than 192 seconds in the restaurant's drive-through is (Round to four decimal places as needed.) (c) What proportion of cars spend between 2 and 3 minutes in the restaurant's drive-through? The proportion of cars that spend between 2 and 3 minutes in the restaurant's drive-through is (Round to four decimal places as needed.) (d) Would it be unusual for a car to spend more than 3 minutes in the restaurant's drive-through? Why? The probability that a car spends more than 3 minutes in the restaurant's drive-through is is than 0.05. (Round to four decimal places as needed.) so it be unusual, since the probability

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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A study found that the mean amount of time cars spent in drive-throughs of a certain fast-food restaurant was 146.9 seconds. Assuming drive-through times are normally distributed with a standard deviation of 31 seconds, complete parts (a) through (d) below. (a) What is the probability that a randomly selected car will get through the restaurant's drive-through in less than 92 seconds? The probability that a randomly selected car will get through the restaurant's drive-through in less than 92 seconds is. (Round to four decimal places as needed.) (b) What is the probability that a randomly selected car will spend more than 192 seconds in the restaurant's drive-through? The probability that a randomly selected car will spend more than 192 seconds in the restaurant's drive-through is (Round to four decimal places as needed.) (c) What proportion of cars spend between 2 and 3 minutes in the restaurant's drive-through? The proportion of cars that spend between 2 and 3 minutes in the restaurant's drive-through is (Round to four decimal places as needed.) (d) Would it be unusual for a car to spend more than 3 minutes in the restaurant's drive-through? Why? The probability that a car spends more than 3 minutes in the restaurant's drive-through is ▼than 0.05. (Round to four decimal places as needed.) so it be unusual, since the probability Time Remaining: 02:53:14 Next
Transcribed Image Text:A study found that the mean amount of time cars spent in drive-throughs of a certain fast-food restaurant was 146.9 seconds. Assuming drive-through times are normally distributed with a standard deviation of 31 seconds, complete parts (a) through (d) below. (a) What is the probability that a randomly selected car will get through the restaurant's drive-through in less than 92 seconds? The probability that a randomly selected car will get through the restaurant's drive-through in less than 92 seconds is. (Round to four decimal places as needed.) (b) What is the probability that a randomly selected car will spend more than 192 seconds in the restaurant's drive-through? The probability that a randomly selected car will spend more than 192 seconds in the restaurant's drive-through is (Round to four decimal places as needed.) (c) What proportion of cars spend between 2 and 3 minutes in the restaurant's drive-through? The proportion of cars that spend between 2 and 3 minutes in the restaurant's drive-through is (Round to four decimal places as needed.) (d) Would it be unusual for a car to spend more than 3 minutes in the restaurant's drive-through? Why? The probability that a car spends more than 3 minutes in the restaurant's drive-through is ▼than 0.05. (Round to four decimal places as needed.) so it be unusual, since the probability Time Remaining: 02:53:14 Next
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