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Answer to Question #47511 in Statistics and Probability for Preeti Saini
Question #47511
The mean weekly a sales of soap bars in different departmental stores was 146.3 bars per store. after an advertising campaign the mean weekly increased to 153.7 and showed a standard deviation of 72.2. Was the advertising campaign successful at 5% level of significance? You may like to use the values given at end.
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