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In pharmacologic research, a variety of clinical chemistry measurements are routinely monitored closely for evidence of side effects of the medication under study. Suppose for adults, typical blood-glucose levels are normally distributed with mean 90 mg/dL and standard deviation 38 mg/dL. Suppose the normal range is 65 to 120 mg/dL.
In some studies, only values at least 1.5 times as high as the upper limit of normal are identified as abnormal. Frequently, tests that yield abnormal results are repeated for confirmation. What is the probability that for a normal person, a test will be at least 1.5 times as high as the upper limit of normal on two separate occasions? Assume the test results are independent.
find the indicated z score. the graph depicts the standard normal distrubtion with mean 0 and standard deviation 1. the
Tthe class for an oral exam, what is the probability that female students and male students will be selected? Round your answer to decimal places.
the characteristic function of the cauchy distribution is e-t determine the characteristic function of x1n?xi i1....n
53 of men consider themselves professional baseball fans. you randomly select 10 men and ask each if he considers
What sample size would be needed to estimate the true proportion of students at your college
Lashing together logs of diameter .30m and length 1.8m. How many logs will be needed to keep them afloat in fresh water. take the density of the logs to be 800kg/m^3.
In looking at your business, when and why would you want to use a one-sample mean test (either z or t) or a two-sample t-test? Create a null and alternate hypothesis for one of these issues. How would you use the results?
Calculate Cohen's d measure effect size for both tests (σ = 20 and σ = 10). Explain how sample size affect outcome of hypothesis test. How does sample size affect measures of effect size?
How many students would be required to estimate the proportion of students who consume coffee? Suppose we want the estimate to be within 5% of the true proportion with 95% confidence.
Conduct a matched pairs t-test to see if the differences in locations is significant - The air in poultry-processing plants often contains fungus spores.
a computer repair service found that a random sample of 45 repair costs had a mean cost of 659. assume that the
the shell of the land snail limocolaria martensiana has two possible color forms. streaked and pallid. in a certain
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