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Author Question: A research firm has been contracted to estimate the mean weekly family expenditure on clothes. He ... (Read 86 times)

penza

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on: Jun 24, 2018
A research firm has been contracted to estimate the mean weekly family expenditure on clothes. He believes that the standard deviation of the weekly expenditure is 125 . Determine with 99 confidence the number of families that must be sampled to estimate the mean weekly family expenditure on clothes to within 15.

Question 2

If the value of the Durbin-Watson test statistic, d, satisfies the inequality d > 4 - dL, we conclude that positive first-order autocorrelation exists.
  Indicate whether the statement is true or false


alexanderhamilton

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

n = 463 (using z = 2.58)

Answer to Question 2

F


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