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According to the Internal Revenue Service, the average length of time for an individual to complete (keep records for, learn, prepare, copy, assemble, and send) IRS Form 1040 is 10.53 hours (without any attached schedules). The distribution is unknown. Let us assume that the standard deviation is 2.5 hours. Suppose we randomly sample 81 taxpayers. a. What is the sampling distribution of the sample mean, including name of the distribution, normal O, its mean, 10.53 0.277778 OF? o and standard error,

According to the Internal Revenue Service, the average length of time for an individual to complete (keep records for, learn, prepare, copy, assemble, and send) IRS Form 1040 is 10.53 hours (without any attached schedules). The distribution is unknown. Let us assume that the standard deviation is 2.5 hours. Suppose we randomly sample 81 taxpayers. a. What is the sampling distribution of the sample mean, including name of the distribution, normal O, its mean, 10.53 0.277778 OF? o and standard error,

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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According to the Internal Revenue Service, the average length of time for an individual to complete (keep records for, learn, prepare, copy, assemble, and send) IRS Form 1040 is 10.53 hours (without any attached schedules). The distribution is unknown. Let us assume that the standard deviation is 2.5 hours. Suppose we randomly sample 81 taxpayers. a. What is the sampling distribution of the sample mean, including name of the distribution, normal O, its mean, 10.53 0.277778 10.53 OF? b. Repeat a if we sampled 100 taxpayers. Name of the distribution, normal O, its mean, 0.25 o and standard error, and standard error, OF? Hint for finding the z-scores
Transcribed Image Text:According to the Internal Revenue Service, the average length of time for an individual to complete (keep records for, learn, prepare, copy, assemble, and send) IRS Form 1040 is 10.53 hours (without any attached schedules). The distribution is unknown. Let us assume that the standard deviation is 2.5 hours. Suppose we randomly sample 81 taxpayers. a. What is the sampling distribution of the sample mean, including name of the distribution, normal O, its mean, 10.53 0.277778 10.53 OF? b. Repeat a if we sampled 100 taxpayers. Name of the distribution, normal O, its mean, 0.25 o and standard error, and standard error, OF? Hint for finding the z-scores
c. What is the z-score/how many standard errors. away is an average of 12 hours for a sample of size 81? 1.3334 x What is the probability that it would take on average over 12 hours for the 81 taxpayers to finish their form 1040? Would you find this unusual? yes no d. What is the z-score/how many standard errors away is an average of 12 hours for a sample of size 100? What is the probability that it would take on average over 12 hours for the 100 taxpayers to finish their form 1040? Would you find this unusual? O no O yes e. What is the z-score/how many standard deviations away is 12 hours for one tax-payer? What is the probability that it would take one person over 12 hours to finish
Transcribed Image Text:c. What is the z-score/how many standard errors. away is an average of 12 hours for a sample of size 81? 1.3334 x What is the probability that it would take on average over 12 hours for the 81 taxpayers to finish their form 1040? Would you find this unusual? yes no d. What is the z-score/how many standard errors away is an average of 12 hours for a sample of size 100? What is the probability that it would take on average over 12 hours for the 100 taxpayers to finish their form 1040? Would you find this unusual? O no O yes e. What is the z-score/how many standard deviations away is 12 hours for one tax-payer? What is the probability that it would take one person over 12 hours to finish
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