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Author Question: When estimating the population mean on the basis of the information contained in a single sample, ... (Read 104 times)

moongchi

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on: Jun 20, 2018
When estimating the population mean on the basis of the information contained in a single sample, one must at least know
 
  a. the estimated standard error of the mean and the mean of the sample
  b. the z score for each raw score
  c. the standard deviation of the underlying distribution of individual scores
  d. the interdecile range

Question 2

For the majority of the items in any given test, the difficulty index
  should be kept at approximately
 
  a. .99
  b. .50
  c. .01
  d. none of these, since item difficulty is not a quantifiable value.


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SVictor

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Reply #1 on: Jun 20, 2018
Answer to Question 1

a

Answer to Question 2

b


moongchi

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Reply 2 on: Jun 20, 2018
Thanks for the timely response, appreciate it

Chelseyj.hasty

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Reply 3 on: Yesterday
Wow, this really help

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