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Random sample of five accidents

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Reference no: EM1389542

A random sample of five accidents resulted in the following number of persons injured: 18, 15, 12, 19, & 21. Using the .01 significance level, can we conclude the population mean is less than 20 for all accidents?

a) State Ho and Ha = ?

b) Test statistic = ?

c) Critical value = ?

Reference no: EM1389542

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