In a planned​ study, there is a known population with a normal​distribution, mu=20​, and sigma=4. What is the predicted mean if the researcher predicts​ (a) a small positive effect​ size, (b) a medium negative effect​ size, (c) a large positive effect​ size, (d) an effect size of d=0.55​, and​ (e) an effect size of d=−1.40​?

trokusr

trokusr

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2022-08-19

In a planned​ study, there is a known population with a normal​distribution, μ = 20​,and σ = 4.
What is the predicted mean if the researcher predicts​
(a) a small positive effect​ size,
(b) a medium negative effect​ size,
(c) a large positive effect​ size,
(d) an effect size of d = 0.55​,
(e) an effect size of σ = 4?

Answer & Explanation

Hamza Conrad

Hamza Conrad

Beginner2022-08-20Added 20 answers

a) Given,
Here for small effect, d = 0.2
Predicted u 1 = u 2 + d s d
substitute values
= 20 + 0.2 4
= 20.8
b) For medium, d = 0.5
Predicted u 1 = u 2 + d s d
substitute values
= 20 + ( 0.5 ) 4
= 18
c)
For large, d = 0.8
Predicted u 1 = u 2 + d s d
substitute values
= 20 + 0.8 4
= 23.2
iroroPagbublh

iroroPagbublh

Beginner2022-08-21Added 5 answers

d) Predicted u 1 = u 2 + d s d
substitute values
= 20 + 0.55 4
= 22.2
e) Predicted u 1 = u 2 + d s d
substitute values
= 20 + ( 1.4 ) 4
= 14.4

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