Mathematics, 19.11.2019 06:31 lukeakalucas
The manager of a grocery store took a random sample of 100 customers. the avg. length of time it took the customers in the sample to check out was 3.1 minutes with a std. deviation of 0.5 minutes. we want to test to determine whether or not the mean waiting time of all customers is significantly > 3 min. at 95% confidence, it can be concluded that the mean of the population isa. significantly greater then 3.18b. not significantly greater than 3c. significantly less than 3d. significantly greater than 3
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