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How are biostatistics applications used in planning programs, policies, and interventions? List three examples.
You decide to compare the rankings of institutions within a three-hour drive of your current home and those beyond a three-hour drive.
Consider a random sample of size n from an exponential distribution, Xi ~ EXP(1,eta). a) Show that Q = X1:n - eta is a pivotal quantity and find its distribution.
A consumer agency wanted to find out if the mean time taken by each of three brands of medicines to provide relief from a headache is the same.
A second sample of 61 has a mean of 100 and a population standard deviation of 8. Conduct a z-test about a difference in sample means using a 0.03 significance level and the following hypotheses.
an airline knows from experience that the distribution of the number of suitcases that get lost each week on a certain
MA260- Monte's TV Sales and Service completed repairs on two sets this morning. The labor cost for the first was $75 and it was $100 for the second. Compute z values for each and comment on your findings.
You own a Pepsi bottling plant, and you are concerned about filling the bottles to the correct level. Should you conduct a one-tailed or two-tailed hypothesis test? Explain.
Over many years, rainfall totals for Sacramento, CA in January ranged from a low of about 0.05 inch to a high of about 19.5 inches.
Should the engineering firm be concerned? Perform an appropriate hypothesis test, showing the necessary calculations and or explaining the process used to obtain the results.
Use the following information to tfind the P-value
A large study of the heights of 1010 adult men found that the mean height was 70 inches tall. The standard deviation was 6 inches.
Suppose that a certain college class contains 45 students. Of these, 26 are sophomores, 25 are chemistry majors, and 7 are neither. A student is selected at random from the class.
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