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Discuss case of the cheerleading squad

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Reference no: EM131672816

Question: A cheerleading squad received a mean rating (out of 100 possible points) of 75 ± 12 (!l ± cr) in competitions over the previous three seasons. The same cheerleading squad performed in 36 local competitions this season with a mean rating equal to 78 in competitions. Suppose we conduct a one-sample z test to determine whether mean ratings increased this season (compared to the previous three seasons) at a .05 level of significance.

(a) State the value of the test statistic and whether to retain or reject the null hypothesis.

(b) Compute effect size using Cohen's d and state whether it is small, medium, or large.

Reference no: EM131672816

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