Managers at an automobile manufacturing plant would like to estimate the mean completion time of an assembly line operation, μ. The managers plan to choos a random sample of completion times and estimate u via the sample. Assuming that the standard deviation of the population of completion times is 10.4 minutes, what is the minimum sample size needed for the managers to be 90% confident that their estimate is within 1.7 minutes of μ? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements). (If necessary, consult a list of formulas.)

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Choosing an appropriate sample size
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Explanation
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Managers at an automobile manufacturing plant would like to estimate the mean completion time of an assembly line operation, μ. The managers plan to choose
a random sample of completion times and estimate u via the sample. Assuming that the standard deviation of the population of completion times is 10.4
minutes, what is the minimum sample size needed for the managers to be 90% confident that their estimate is within 1.7 minutes of μ?
A
Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole
number that satisfies the requirements).
(If necessary, consult a list of formulas.)
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Transcribed Image Text:esc C = O CONFIDENCE INTERVALS AND HYPOTHESIS TESTING Choosing an appropriate sample size 0 Explanation ! 1 FI Q Managers at an automobile manufacturing plant would like to estimate the mean completion time of an assembly line operation, μ. The managers plan to choose a random sample of completion times and estimate u via the sample. Assuming that the standard deviation of the population of completion times is 10.4 minutes, what is the minimum sample size needed for the managers to be 90% confident that their estimate is within 1.7 minutes of μ? A Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements). (If necessary, consult a list of formulas.) -8 @ 2 Check F2 W C #3 X 20 Faculty M F3 E D 000 DOD F4 S4 S $ % 5 ¯ A F5 R T www-awu.aleks.com C MacBook Air A 6 " F6 CUNY TRAN Y 887 & II 44 F7 U * Cheng Search C 8 ©2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center 1 Accessibility F8 I 00000 0.5 61 10 - 14 F9 O 1 ✰ 0 4 F10 P ALEKS-Nad.... - 4) F11 + = Na { 1 [ C F12
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