Find the critical value-test statistics-what is conclusion

Reference no: EM13311183

A supermarket manager claims that the standard deviation for errors when a scanner is used is less then 200. At the 0.01 level test the claim if a sample of 20 tickets found a standard deviation of 189. Select the null and alternate hypotheses. find the critical value, test statistics, what is the conclusion

Reference no: EM13311183

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