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Author Question: Z-scores are useful because a) z-scores indicate a person's standing as compared to the group ... (Read 112 times)

hbsimmons88

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on: Jun 19, 2018
Z-scores are useful because
 
  a) z-scores indicate a person's standing as compared to the group mean
   b) z-scores can be converted to percentiles (assuming a relatively normal distribution)
   c) z-scores are usually positive
  d) both a and b

Question 2

Item difficulty refers to
 
  a) item complexity
   b) item obscurity
  c) the number of people who answer an item correctly
  d) all of the above


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sylvia

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Reply #1 on: Jun 19, 2018
Answer to Question 1

D

Answer to Question 2

C


hbsimmons88

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Reply 2 on: Jun 19, 2018
Excellent

olderstudent

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Reply 3 on: Yesterday
Wow, this really help

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