According to an IRS study, it takes a mean of 330 minutes for taxpayers to prepare, copy, and electronically file a 1040 tax form. This distribution of times follows the normal distribution and the standard deviation is 80 minutes. A consumer watchdog agency selects a random sample of 40 taxpayers. a. What is the standard error of the mean in this example? (Round your answer to 3 decimal places.) Standard error of the mean b. What is the likelihood the sample mean is greater than 320 minutes? (Round z value to 2 decimal places and final answer to 4 decimal places.) Probability c. What is the likelihood the sample mean is between 320 and 350 minutes? (Round z value to 2 decimal places and final answer to 4 decimal places.) Probability d. What is the likelihood the sample mean is greater than 350 minutes? (Round z value to 2 decimal places and final answer to 4 decimal places.) Probability e. What is the probability that the sampling error would be more than 20 minutes? (Round z value to 2 decimal places and final answer to 4 decimal places.) Probability
According to an IRS study, it takes a mean of 330 minutes for taxpayers to prepare, copy, and electronically file a 1040 tax form. This distribution of times follows the normal distribution and the standard deviation is 80 minutes. A consumer watchdog agency selects a random sample of 40 taxpayers. a. What is the standard error of the mean in this example? (Round your answer to 3 decimal places.) Standard error of the mean b. What is the likelihood the sample mean is greater than 320 minutes? (Round z value to 2 decimal places and final answer to 4 decimal places.) Probability c. What is the likelihood the sample mean is between 320 and 350 minutes? (Round z value to 2 decimal places and final answer to 4 decimal places.) Probability d. What is the likelihood the sample mean is greater than 350 minutes? (Round z value to 2 decimal places and final answer to 4 decimal places.) Probability e. What is the probability that the sampling error would be more than 20 minutes? (Round z value to 2 decimal places and final answer to 4 decimal places.) Probability
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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I need help answering a-e please
![According to an IRS study, it takes a mean of 330 minutes for taxpayers to prepare, copy, and electronically file a 1040 tax form. This
distribution of times follows the normal distribution and the standard deviation is 80 minutes. A consumer watchdog agency selects a
random sample of 40 taxpayers.
a. What is the standard error of the mean in this example? (Round your answer to 3 decimal places.)
Standard error of the mean
b. What is the likelihood the sample mean is greater than 320 minutes? (Round z value to 2 decimal places and final answer to 4
decimal places.)
Probability
c. What is the likelihood the sample mean is between 320 and 350 minutes? (Round z value to 2 decimal places and final answer to
4 decimal places.)
Probability
d. What is the likelihood the sample mean is greater than 350 minutes? (Round z value to 2 decimal places and final answer to 4
decimal places.)
Probability
e. What is the probability that the sampling error would be more than 20 minutes? (Round z value to 2 decimal places and final
answer to 4 decimal places.)
Probability](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb155383f-1482-4158-bfc0-94ad91579101%2Fe1e3f390-0291-4b50-a8f1-b48cc8416bc4%2Fv8vdf2k_processed.png&w=3840&q=75)
Transcribed Image Text:According to an IRS study, it takes a mean of 330 minutes for taxpayers to prepare, copy, and electronically file a 1040 tax form. This
distribution of times follows the normal distribution and the standard deviation is 80 minutes. A consumer watchdog agency selects a
random sample of 40 taxpayers.
a. What is the standard error of the mean in this example? (Round your answer to 3 decimal places.)
Standard error of the mean
b. What is the likelihood the sample mean is greater than 320 minutes? (Round z value to 2 decimal places and final answer to 4
decimal places.)
Probability
c. What is the likelihood the sample mean is between 320 and 350 minutes? (Round z value to 2 decimal places and final answer to
4 decimal places.)
Probability
d. What is the likelihood the sample mean is greater than 350 minutes? (Round z value to 2 decimal places and final answer to 4
decimal places.)
Probability
e. What is the probability that the sampling error would be more than 20 minutes? (Round z value to 2 decimal places and final
answer to 4 decimal places.)
Probability
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