Business, 29.09.2021 20:00 kace04

Jerry observes the difference on sales between group x and group y. The 70 days sample show that group x sold 1700 smartphones in average per day. Meanwhile, the 80 days sample show group y sold 1800 smartphones in average per day. The population standard deviation for group x is $270 and $320 for group y. At the 0.05 significance level, can Jerry conclude that the average sales of group y is greater than group x’s? Determine the p value!

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Jerry observes the difference on sales between group x and group y. The 70 days sample show that gro...

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