Mathematics

Mathematics, 06.03.2020 03:11, blkrosesss

Please help I dont know where to start

the standard deviation of a simple random sample of 40 calling times on a payphone is found to be 2.6 minutes. find the test statistic to test a claim that the standard deviation of all phone calls on a payphone is less than 2.9 minutes. use a 0.05 significance level

32.152

31.348

48.519

34.966

answer

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the standard deviation of a simple random sample...

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