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Author Question: A study which produces large amounts of secondary variance will probably be found to be extremely ... (Read 44 times)

renzo156

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  • Posts: 526
on: Jun 20, 2018
A study which produces large amounts of secondary variance will probably
  be found to be extremely low in
 
  a. sampling error
  b. Type 2 error
  c. random error
  d. internal validity

Question 2

The standard deviation of the population of elementary school math-
  achievement scores is 7.78. A random sample of 20 elementary school children
  was selected and yielded a mean achievement score of 80.04.
 
  a. Calculate the standard error of the mean.
  b. Use the z test to establish whether this sample could be representative of
   the general population of elementary school children whose mean math
   achievement score is known to be 78.00.


pikon

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  • Posts: 361
Reply #1 on: Jun 20, 2018
Answer to Question 1

d

Answer to Question 2

a SEm=1.74


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