The rocky mountain district sales manager of wrath publishing Inc. a Kohl's text book publishing company, claims that the sales representatives make an average of 38 sells cars per week on professors. Several rep say that this estimate is too low. To investigate a random sample of 30 so representatives reveals at the main number of calls made last week was 40. The standard deviation of the sample is 2.2 calls. Using the .100 significance level can we conclude that the main number of calls per sales person per week is more than 38?

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