Conclude population mean is less than for all accidents


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 = ?

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Basic Statistics: Conclude population mean is less than for all accidents
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