7. A simple random sample of 50 test scores from the scores on a statewide exam given to all graduating high school students produced a sample mean of 60 and sample standard deviation of 12. The state teacher's association believes the mean test score for all students who took the test is greater than 50 and wants to confirm this at the .01 level of significance. a) state the null and alternative hypotheses b) state the distribution of the test statistic c) compute the test statistic

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