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Let p_1 be the proportion of successes in the first population and let p_2 be the proportion of successes in the second population. Suppose that you are testing the hypotheses:
H_0:p_1-p_2=0 \ H_a:p_1-p_2 neq 0
Futhermore suppose that z^*=1.73, find and input the p-value for this test. Round your answer to 4 decimal places.
In checking the quality of the work, she notices that some slight blemishes occasionally are apparent. A sample of 20 pieces of work resulted in the following number of blemishes on each piece:
If a random sample of 500 third year students is taken at a city university, what is an estimate of the probability that 20 percent or less had switched majors within their first two years?
Of those who made no purchase, 201 were happy with the service and 221 were not. Use probability rules (when appropriate) to find the probability that a shopper made a purchase.
Let z represent the standard normal variable and suppose a value is randomly selected. Find each of the following probabilities by:
Find the point estimate p-hat and the margin of error for the confidence interval (0.444, 0.484)
The given level of significance is an alpha of .005. Your MSA is 6,200 and your MSW is 1,000. Will you reject your null hypothesis that all population means are equal or will you not reject?
The upper limit of a 95% confidence interval for the population mean would equal:
What additional information is obtained from measurements on an ordinal scale compared to measurements on a nominal scale?
What is the probability that a randomly chosen eight-week old baby smiles between 2 and 18 seconds?
Assume that you go to the drive through window at Wendy's and place an order. Two friends of yours independently place orders at the drive through window at the same Wendy's.
Research has shown that losing even one night's sleep can have a significant effect on performance of complex tasks such as problem solving ( Linde & Bergstroem, 1992).
Find the mean, median, and range for each of the two data sets.Find the mean, median, and range for each of the two data sets.
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