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The value of the z score in a hypothesis test is influenced by a variety of factors. Assuming that all other variables are held constant explain how the value of z is influenced by each of the following:
a. increasing the difference b/w the sample mean and the orginal population mean.
b.increasing the population standard deviation.
c. increasing the number of scores in the sample.
See if there is a difference in their means and variances.
A company is producing cylindrical blocks for a children's toy. The average diameter of a block is 3.5 inches. Sixteen blocks are inspected and the diameters are measured.
What was the cost for the 10 percent of employees who incurred the highest dental expense?
Commonwealth Edison wants to identify its heaviest users, which are those that are in the top 6% of electric consumption. How many kilowatt hours in January would qualify for the heavy user classification?
A researcher is investigating the effectiveness of a new study-skills training program for elementary school children. A sample of n= 25 third grade children and each child is given a standardized achievement test at the end of the year.
Determine the probability that the project will be completed in 90 days or less.
The Bureau of the Census reports that the average commuting time for citizens of both Baltimore, Maryland, and Miami, Florida is approximately 29 minutes (uMiami=29 and uBaltimore=29 minutes).
I have fit a line to data representing cholesterol readings for 28 individuals starting a cholesterol reducing drug. The computer provides the following output, The degrees of freedom for the t test for the slope are
A company auditor was interested in estimating the total number of travel vouchers that were incorrectly filed. In a SRS of size n =50 oft of the group of N = 250, were filed incorrectly.
If p is the probability of Event 1 and (1-p) is the probability of Event 2, based on the expected returns, for what values of p would you select A? B? C? Values in the table are payoffs.
One of the major measures of the quality of service provided by any organization is the speed with which responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a major ..
If random sample of thirty six customer transactions points out that sample mean withdrawal amount is $172, is there evidence to think that population mean withdrawal amount is no longer $160? Determine the mean of data above?
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