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gogolik [260]
3 years ago
10

A scientist is studying the impact of certain vitamins on a person's ability to remember. The sample size for the experimental g

roup was 25. When a two-tailed t test was calculated, the t statistic came out to be 1.54. What are the percent of variance (r 2) and the size of the effect
Mathematics
1 answer:
vovikov84 [41]3 years ago
3 0

Answer:

0.09 average effect

Step-by-step explanation:

Given that the t statistics = 1.54

Sample size (n) = 25

Therefore, variance = t²/n

Variance = 1.54²/25

Variance = 2.372/25

Variance = 0.09

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