A cheerleading squad received a mean rating (out of 100 possible points) of 66 8 ( ) in competitions over the previous three seasons.

μσ

 in competitions over the previous three seasons. The same cheerleading squad performed in 2568z(a) State the value of the test statistic. (Round your answer to two decimal places.)

z =  

State whether to retain or reject the null hypothesis.Retain the null hypothesis.

Reject the null hypothesis.

(b) Compute effect size using Cohen’s d. (Round your answer to two decimal places.)

d = 

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