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Home Q & A Board Science-Related Homework Help Psychology Developmental Psychology
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hbuedu hbuedu
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6 years ago
A third study with 2,000 subjects found an experimental group mean of 29.26 (SD = 2.5) and a control group mean of 29.26 (SD = 1.5). What is the average effect size of the three studies?
 
  a. 1.09 c. 1.84
  b. 1.66 d. None of these are true.

Ques. 2

A study of a new reading training program achieved, with 100 subjects, the following results: experimental group mean = 30.25 (SD = 3.28) and control group mean = 25.14 (SD = 4.75). However, a second study with 541 subjects found experimental group mean = 28.81 (SD = 2.56) and control group mean = 26.62 (SD 2.01).
 
  a. The first study had a higher effect size.
  b. The second study had a higher effect size.
  c. Both studies had similar effect sizes.
  d. None of these are true.

Ques. 3

The z-scores for X and Y variables are exactly the same except they have opposite signs. The coefficient of determination is
 
  a. 0.00.
  b. -1.00.
  c. +1.00.
  d. not possible to compute with this information.
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xx
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6 years ago
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hbuedu Author
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6 years ago
Helped a lot
kiara23247843
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Yesterday
This helped my grade so much Perfect
kevin12323h
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2 hours ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
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