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Author Question: A manager wishes to estimate a population mean using a 95 confidence interval estimate that has a ... (Read 83 times)

tingc95

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on: Jun 24, 2018
A manager wishes to estimate a population mean using a 95 confidence interval estimate that has a margin of error of 44.0. If the population standard deviation is thought to be 680, what is the required sample size?
 
  A) 1215
  B) 871
  C) 1050
  D) 918

Question 2

The Dilmart Company has 8,000 parts in inventory. The mean dollar value of these parts is 10.79 with a standard deviation equal to 3.34.
 
  Suppose the inventory manager selected a random sample of n = 64 parts from the inventory and found a sample mean equal to 11.27. The probability of getting a sample mean at least as large as 11.27 is approximately 0.444. Indicate whether the statement is true or false


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kaillie

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Reply #1 on: Jun 24, 2018
Answer to Question 1

D

Answer to Question 2

FALSE


tingc95

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Reply 2 on: Jun 24, 2018
Great answer, keep it coming :)

DylanD1323

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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