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A store has an average of 25 people arriving each minute to checkout and each person on the average require 4 minutes to be processed at the checkout. What is the minimum number of cashiers required?
If we wanted to shorten the interval of the estimation of the true mean of Saturday sales to a width of $600 in total, what should the size of our sample be to achieve it?
When modelling E(y) with single qualitative independent variable, number of 0 - 1 dummy variables in model is equal to number of levels of qualitative variable.
If a worker is chosen at random, what is the probability that he or she.Is very improbable to switch jobs. Is somewhat likely or very likely to switch jobs.
Using the 0.10 level of significance, is there evidence that the population mean is above $300?
Construct the 90% and 95% interval estimates for the population mean weekly sales.
Construct a grouped frequency distribution using six classes.
To demonstrate the effectiveness of the drug, a researcher selects a sample of n = 25 children diagnosed with the disorder and measure each child's attention span before and after taking the drug.
The instructor wanted to "pass" anyone who scored above 69. What proportion of exams will have passing scores?
At the .05 significance level, is the number of units produced on the afternoon shift larger?
The average hourly wage of employees of a certain company is $9.83. Assume the variable is normally distributed.
Difference in the mean number of times men and women order take-out dinners in a month? What is the p-value?
If the standard deviation of the amount of coffee dispensed is 0.4oz and the amount of coffee dispensed is normally distributed.
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