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I have a problem that I have worked several times, and I keep getting the same...

I have a problem that I have worked several times, and I keep getting the same answer, but am told it is wrong. Can someone help me understand what I am doing wrong? Here is the problem: I am getting .22

A random sample of n = 16 scores is obtained from a population with a mean of µ = 45. After a treatment is administered to the individuals in the sample, the sample mean is found to be M = 49.2.

Assuming that the sample standard deviation is s = 8, compute r².

math   Statistics-And-Probability   
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Answer #1

We are given:


We first calculate the value of 't'

Hence r2 is calculated as:

Your calculations were nearly correct. Just some rounding issues. Answer will be 0.23.

Please do upvote if you are satisfied! Let me know in the comments if anything is not clear. I will reply ASAP!

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