After 3 months of a normal diet, the motor skill scores of the nine children (from...
After 3 months of a normal diet, the motor skill scores of the nine children (from Question 1 ) are: 48, 68, 77, 46, 47, 46, 41, 51, 34. A researcher is interested in investigating whether the new motor skill scores are worse than the motor skills score of the normal population. The mean for a normal population is 60.
a. State the null and alternative hypotheses (you can use words or notation).
b. Perform a t-test
c. Decide whether to reject or retain the null hypothesis.
d.Compute an effect size (d) for these data.
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After 3 months of a normal diet, the motor skill scores of the
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