W7.5: ALEKS Final Exam Question 20 of 25 (4 points) | Question Attempt: 1 of 1 Managers at an automobile manufacturing plant would like to examine the mean completion time, u, of an assembly line operation. The past data indicate that the mean completion time is 44 minutes, but the managers have good reason to believe that this value has increased. The managers plan to perform a statistical test. After choosing a random sample of assembly line completion times, the managers compute the sample mean completion time to be 46 minutes. The standard deviation of the population of completion times can be assumed not to have changed from the previously reported value of 6 minutes. Based on this information, complete the parts below. (a) What are the null hypothesis Ho and the alternative hypothesis H, that should be used for the test? H:0 μ x (b) Suppose that the managers decide to reject the null hypothesis. What sort of error might they be making? (Choose one)▼ (c) Suppose the true mean completion time for the assembly line operation is 48 minutes. Fill in the blanks to describe a Type II error. A Type II error would be (Choose one) the hypothesis that μ is (Choose one) when, in fact, u is (Choose one)▼ (Choose one)▼ Continue *+ Q Search F6 F7 & 5 6 7 8 W E R T S D F9 F10 G H J K X C V B N 3) O<0 OSO O>O ロマロ ローロ G □≠口 Adissa Save For Later Submit Assignment ©2024 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility 9 P Alt Ctri ? Delete Priso Backspace Num Lock PgUp Enter Shift Home 112 6/16 Esp

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W7.5: ALEKS Final Exam
Question 20 of 25 (4 points) | Question Attempt: 1 of 1
Managers at an automobile manufacturing plant would like to examine the mean completion time, u, of an assembly line operation. The past data indicate that
the mean completion time is 44 minutes, but the managers have good reason to believe that this value has increased. The managers plan to perform a
statistical test.
After choosing a random sample of assembly line completion times, the managers compute the sample mean completion time to be 46 minutes. The standard
deviation of the population of completion times can be assumed not to have changed from the previously reported value of 6 minutes.
Based on this information, complete the parts below.
(a) What are the null hypothesis Ho and the alternative hypothesis H, that should be used for the test?
H:0
μ
x
(b) Suppose that the managers decide to reject the null hypothesis. What sort of error might they be making?
(Choose one)▼
(c) Suppose the true mean completion time for the assembly line operation is 48 minutes. Fill in the blanks to describe a
Type II error.
A Type II error would be (Choose one) the hypothesis that μ is (Choose one)
when, in fact, u is (Choose one)▼
(Choose one)▼
Continue
*+
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N
3)
O<0 OSO O>O
ロマロ
ローロ
G
□≠口
Adissa
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Transcribed Image Text:W7.5: ALEKS Final Exam Question 20 of 25 (4 points) | Question Attempt: 1 of 1 Managers at an automobile manufacturing plant would like to examine the mean completion time, u, of an assembly line operation. The past data indicate that the mean completion time is 44 minutes, but the managers have good reason to believe that this value has increased. The managers plan to perform a statistical test. After choosing a random sample of assembly line completion times, the managers compute the sample mean completion time to be 46 minutes. The standard deviation of the population of completion times can be assumed not to have changed from the previously reported value of 6 minutes. Based on this information, complete the parts below. (a) What are the null hypothesis Ho and the alternative hypothesis H, that should be used for the test? H:0 μ x (b) Suppose that the managers decide to reject the null hypothesis. What sort of error might they be making? (Choose one)▼ (c) Suppose the true mean completion time for the assembly line operation is 48 minutes. Fill in the blanks to describe a Type II error. A Type II error would be (Choose one) the hypothesis that μ is (Choose one) when, in fact, u is (Choose one)▼ (Choose one)▼ Continue *+ Q Search F6 F7 & 5 6 7 8 W E R T S D F9 F10 G H J K X C V B N 3) O<0 OSO O>O ロマロ ローロ G □≠口 Adissa Save For Later Submit Assignment ©2024 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility 9 P Alt Ctri ? Delete Priso Backspace Num Lock PgUp Enter Shift Home 112 6/16 Esp
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