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katen-ka-za [31]
3 years ago
11

A treatment is administered to a sample of n = 9 individuals selected from a population with a mean of m = 80 and a standard dev

iation of s = 12. after treatment, the effect size is measured by computing cohen's d, and a value of d = 0.50 is obtained. based on this information, what is the mean for the treated sample?
Mathematics
1 answer:
kupik [55]3 years ago
5 0
Cohen's d is calculated according to the formula:
d = (mean difference) / standard deviation
0.5 = mean difference / 12
Therefore, mean difference = 6
Since we have a population mean of 80, the sample mean must be 80 + 6 = 86.
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ivolga24 [154]

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A root with square root or under root is only obtained when we take the square root of both sides. Remember that when we take a square root, there are two possible answers:

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For example, for the equation:

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