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Author Question: To compute the necessary sample size for an interval estimate of a population mean, all of the ... (Read 65 times)

AEWBW

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on: Jun 24, 2018
To compute the necessary sample size for an interval estimate of a population mean, all of the following procedures are recommended when  is unknown except
 a. use the estimated  from a previous study.
  b. use the sample standard deviation from a preliminary sample.
   c. use judgment or a best guess.
  d. use .5 as an estimate.

Question 2

If the lower control limit of a P chart is negative,
 a. a mistake has been made in the computations.
  b. use the absolute value of the lower limit.
  c. it is set to zero.
  d. it is an indication that the process is out of control.


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jasonq

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

d

Answer to Question 2

c


AEWBW

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Reply 2 on: Jun 24, 2018
Wow, this really help

Dominic

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

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