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Hunter-Best [27]
3 years ago
8

For an independent-measures research study (i.e., independent measures t Test), the data show an 8-point difference between the

two treatment means and a pooled variance of 16. Given this information, what is the value of Cohen’s d?
A. 5
B. 3
C. 2
D. Cannot answer without knowing the sample sites
Mathematics
1 answer:
zloy xaker [14]3 years ago
7 0

Answer:

C. 2

Step-by-step explanation:

Cohen's d is a parameter used to express the standardised difference between two means. It is defined as the difference between the means divided by the pooled standard deviation.

In this case, the difference between both means (M2-M1) is 8. As for the pooled standard deviation, simply take the square root of the given pooled variance:

S=\sqrt{S^2}\\S=\sqrt{16} \\S= 4

Therefore, the value of Cohen's d (d) is:

d=\frac{M_{2} -M_{1}}{S} \\d=\frac{8}{4}\\d=2

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