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A manager is interested in determining if the population standard deviation has dropped below 139. Based on a sample of n 20 items selected randomly from the population, conduct the appropriate hypothesis test at a 0.05 significance level. The sample standard deviation is 121. OD. Ho: o < 19,321 Ha:o2 19,321 State the decision rule. Select the correct choice below and, if necessary, fill in any answer boxes (Round to four decimal places as needed.) complete your choice. O A. If the test statistic, y >y?a, reject H, or if the test statistic, y y? = reject Ho. Otherwise, do not reject Ha. O C. If the test statistic, y

A manager is interested in determining if the population standard deviation has dropped below 139. Based on a sample of n 20 items selected randomly from the population, conduct the appropriate hypothesis test at a 0.05 significance level. The sample standard deviation is 121. OD. Ho: o < 19,321 Ha:o2 19,321 State the decision rule. Select the correct choice below and, if necessary, fill in any answer boxes (Round to four decimal places as needed.) complete your choice. O A. If the test statistic, y >y?a, reject H, or if the test statistic, y y? = reject Ho. Otherwise, do not reject Ha. O C. If the test statistic, y

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
Section10.5: Comparing Sets Of Data
Problem 14PPS
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A manager is interested in determining if the population standard deviation has dropped below 139. Based on a sample of n= 20 items selected randomly from the population, conduct the appropriate hypothesis test at a 0.05 significance level. The sample standard deviation is 121. OD Họ: o < 19,321 Ha: o2 19.321 State the decision rule. Select the correct choice below and, if necessary, fill in any answer boxes to complete your choice. (Round to four decimal places as needed.) O A. If the test statistic, >x212=. reject H, or if the test statistic, y <x12 reject Ho. Otherwise, do not reject Ho OB. If the test statistic, >x2 =. reject H. Otherwise, do not reject H,. OC. If the test statistic, <x =. reject Ho- Otherwise, do not reject Hg- Find the test statistic, y (Round to two decimal places as needed.) Choose the correct conclusion below. O A. Reject Hg. There is suficient evidence that the population standard deviation is less than 139. O B. Reject Ho- There is insufficient evidence that the population standard deviation is less than 139. OC. Do not reject Hg. There is insufficient evidence that the population standard deviation is less than 139. OD. Do not reject Ho. There sufficient evidence that the population standard deviation is less than 139.
Transcribed Image Text:A manager is interested in determining if the population standard deviation has dropped below 139. Based on a sample of n= 20 items selected randomly from the population, conduct the appropriate hypothesis test at a 0.05 significance level. The sample standard deviation is 121. OD Họ: o < 19,321 Ha: o2 19.321 State the decision rule. Select the correct choice below and, if necessary, fill in any answer boxes to complete your choice. (Round to four decimal places as needed.) O A. If the test statistic, >x212=. reject H, or if the test statistic, y <x12 reject Ho. Otherwise, do not reject Ho OB. If the test statistic, >x2 =. reject H. Otherwise, do not reject H,. OC. If the test statistic, <x =. reject Ho- Otherwise, do not reject Hg- Find the test statistic, y (Round to two decimal places as needed.) Choose the correct conclusion below. O A. Reject Hg. There is suficient evidence that the population standard deviation is less than 139. O B. Reject Ho- There is insufficient evidence that the population standard deviation is less than 139. OC. Do not reject Hg. There is insufficient evidence that the population standard deviation is less than 139. OD. Do not reject Ho. There sufficient evidence that the population standard deviation is less than 139.
A manager is interested in determining if the population standard deviation has dropped below 139. Based on a sample of n = 20 items selected randomly from the population, conduct the appropriate hypothesis test at a 0.05 significance level. The sample standard deviation is 121. Determine the null and alternative hypotheses. O A. Ho: o2 19,321 Ha:o < 19,321 OB. Ho: o < 139 Ha: o2 139 OC. Họ o = 139 Hại o²+ 139 OD. Ho: o <19,321 Ha: o2 19,321 State the decision rule. Select the correct choice below and, if necessary, fill in any answer boxes to complete your choice. (Round to four decimal places as needed.) O A. If the test statistic, >x12 = reject H, or if the test statistic, <x-/2 =. reject Ho. Otherwise, do not reject Ho- O B. If the test statistic, y>x = reject Hg. Otherwise, do not reject Ho- OC. If the test statistic, <x.. =. reject Ho. Otherwise, do not reject Ho- Find the test statistic, .
Transcribed Image Text:A manager is interested in determining if the population standard deviation has dropped below 139. Based on a sample of n = 20 items selected randomly from the population, conduct the appropriate hypothesis test at a 0.05 significance level. The sample standard deviation is 121. Determine the null and alternative hypotheses. O A. Ho: o2 19,321 Ha:o < 19,321 OB. Ho: o < 139 Ha: o2 139 OC. Họ o = 139 Hại o²+ 139 OD. Ho: o <19,321 Ha: o2 19,321 State the decision rule. Select the correct choice below and, if necessary, fill in any answer boxes to complete your choice. (Round to four decimal places as needed.) O A. If the test statistic, >x12 = reject H, or if the test statistic, <x-/2 =. reject Ho. Otherwise, do not reject Ho- O B. If the test statistic, y>x = reject Hg. Otherwise, do not reject Ho- OC. If the test statistic, <x.. =. reject Ho. Otherwise, do not reject Ho- Find the test statistic, .
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