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Question: On average last year a local leisure centre had 230 customers per day, standard deviation 27, and the distribution of customers was found to be Normal. Determine the probability that on any one day the centre has:
(a) more than 270 customers
(b) less than 210 customers
(c) between 225 and 250 customers.
Two methods for training accountants are to be compared. Students are randomly assigned to one of the two methods.- Using Welch's test, would you conclude that the methods differ in terms of the average return? Use α = 0.05.
If the standard deviation of weekly demand for the toy increases from 300 units to 500 units, how many more toys would have to be stocked to ensure.
To test the hypothesis that students who finish an exam first get better grades, Professor Barker kept track of the order in which papers were handed in.
Compute the mean, median, and mode. Which of these measures of central tendency do you think most accurately describes the lifestyle variable you are looking at?
given a total study size of n and comping g levels of the explanatory factor the numerator degrees of freedom and the
compare the mean for the heights of males which is 69.78 and the mean for the heights of females which is 67.08.
The mean level of schooling for a population is 8 years and the standard deviation is 1 year. What is the probability that a randomly selected individual from the population will have had between 6 and 10 years of schooling? Less than 6 years or m..
The weights of a sample of 15 marathon runners were taken before and after a training run to test whether marathon runners lose dangerous levels of fluids.
a sample of four tires is taken from alot of brand-a tires. another sample of four tires is taken from a lot of brand-b
Use information given by the applet to explain whether or not the Empirical Rule applies for Ideal Height.- Assuming the Empirical Rule applies, give numerical values for the interval that will contain about 99.7% of the data values.
An auditor reviewed 25 oral surgery insurance claims from a particular surgical office, determining that the mean out-of-pocket patient billing above the reimbursed amount was $275.66 with a standard deviation of $78.11.
Determine the confidence interval for population mean and the Superintendent wants to determine the average amount of hours per week the student population studies at home.
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