Question 2. A large city claims that its citizens average commute length per day is 87 minutes with a standard deviation of 22 minutes. Assume that the commute times by all such citizens are normally distributed. Find the probability that a randomly selected citizen's commute will be more than 114 minutes.
Question 2. A large city claims that its citizens average commute length per day is 87 minutes with a standard deviation of 22 minutes. Assume that the commute times by all such citizens are normally distributed. Find the probability that a randomly selected citizen's commute will be more than 114 minutes.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 14PPS
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Question
![Question 2. A large city claims that its citizens average commute length
per day is 87 minutes with a standard deviation of 22 minutes. Assume
that the commute times by all such citizens are normally distributed.
Find the probability that a randomly selected citizen's commute
will be more than 114 minutes.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa658fe65-06ca-4677-a67f-37eb77e50c99%2F5c7ef7f6-8b39-4a2a-8f78-e788ea421057%2Fhhaovf4_processed.png&w=3840&q=75)
Transcribed Image Text:Question 2. A large city claims that its citizens average commute length
per day is 87 minutes with a standard deviation of 22 minutes. Assume
that the commute times by all such citizens are normally distributed.
Find the probability that a randomly selected citizen's commute
will be more than 114 minutes.
![Question 3. Customers sometimes have to wait a long time to speak to a
customer service representative when they call regarding disputed charges
with a cell phone provider. A random sample of 25 such calls yielded a
mean waiting time of 22 minutes with a standard deviation of 6 minutes.
Construct a 99% confidence interval for the population mean of such
waiting times. Assume that such waiting times for the population follow a
normal distribution.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa658fe65-06ca-4677-a67f-37eb77e50c99%2F5c7ef7f6-8b39-4a2a-8f78-e788ea421057%2Fbqgweulx_processed.png&w=3840&q=75)
Transcribed Image Text:Question 3. Customers sometimes have to wait a long time to speak to a
customer service representative when they call regarding disputed charges
with a cell phone provider. A random sample of 25 such calls yielded a
mean waiting time of 22 minutes with a standard deviation of 6 minutes.
Construct a 99% confidence interval for the population mean of such
waiting times. Assume that such waiting times for the population follow a
normal distribution.
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