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Author Question: A precision control engineer is interested in the mean length of tubing being cut automatically by ... (Read 54 times)

Tazate

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on: Jun 24, 2018
A precision control engineer is interested in the mean length of tubing being cut automatically by machine. It is known that the standard deviation in the cutting length is 0.15 feet. A sample of 60 cut tubes yields a mean length of 12.15 feet. This sample will be used to obtain a 99 confidence interval for the mean length cut by machine.
 a. What is the z / 2 value to use in obtaining the confidence interval?
  b. Develop the 99 confidence interval for .

Question 2

Multicollinearity is present when there is a high degree of correlation between the independent variables included in the regression model.
  Indicate whether the statement is true or false


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adf223

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

a. z / 2 = 2.58
b. LCL = 12.10 and UCL = 12.20 (feet)

Answer to Question 2

T


Tazate

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Reply 2 on: Jun 24, 2018
Gracias!

bassamabas

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Reply 3 on: Yesterday
Wow, this really help

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