Business, 10.10.2019 18:30 mayhy100

The scores of high school seniors on the act college entrance examination in a recent year had mean μ = 20.8 and standard deviation σ = 4.8. the distribution of scores is only roughly normal.(a) what is the approximate probability that a single student randomly chosen from all those taking the test scores 23 or higher? (round your answer to four decimal ) now take an srs of 25 students who took the test. what are the mean and standard deviation of the sample mean score x of these 25 students? (round your answers to two decimal ) what is the approximate probability that the mean scoreof these students is 23 or higher? (round your answer to four decimal places.)

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