Mathematics, 02.04.2021 01:00 brianabrady06
The manager of an online shop wants to determine whether the mean length of calling time of its customers is significantly less than 9 minutes. A random sample of 28 customers was taken. The average length of calling time in the sample was 8.1 minutes with a standard deviation of 2.9 minutes. At a 0.05 level of significance, it can be concluded that the mean of the population is:
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The manager of an online shop wants to determine whether the mean length of calling time of its cust...
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