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Suppose that the mean G.P.A. of a group of high school students is 3.0, with a standard deviation of 0.3. Their Math SAT scores have a mean of 500 with a standard deviation of 100. If the joint distribution is a bivariate normal with p=0.4, find the probability that a student has a Math SAT above 600, given that her G.p.a. is 3.5.
Use the confidence level and sample data to find a confidence interval for estimating the population mean m.
1.a manufacturer receives parts from two suppliers. an srs of 400 parts from supplier 1 finds 20 defective. an srs of
Assuming that the manager's claim is correct, calculate the probability that 117 or fewer of 205 randomly selected marketing researchers would disapprove of the scenario.
In a study designed to determine patientâ??s acceptance of a new pain reliever, 100 physicians each selected a sample of 25 patients to participate in the study.
Consider in you response how the concepts of a population (and its associated parameters) and the sample (and its associated estimates) fits into the discussion.
Do you believe that the variance of sales before announcement of increasing price is equal to variance of sales after announcement?
No, there is not sufficient information to reject the hypothesis that the proportion of cats and the proportion of dogs that sleep more than 10 hours per day are the same because the test value -0.65 is inside the acceptance region (-1.96,1.96).
question women make up 24 of the science and engineering workforce. in a random sample of 400 science and engineering
A board of directors at the Anchor Pointe Marina is studying the usage of boats among its members. A sample of 30 members who have bots 10 to 20 feet in length showed that they used their boats an average of 11 days last July.
Industry standards suggest that 10 percent of new vehicles require warranty service within the first year. What is the probability that none of these vehicles requires warranty service?
Two manufacturing facilities produce 1280 × 1024 LED (light-emitting diode) displays. Twelve displays are chosen at random from each lab, and the number of bad pixels is noted for each display.
Fizz fizz soda comes in two varieties, regular and diet. If a researcher has 8 boxes of each, how many ways can he select 2 boxes of each for a quality control test? Which answer would be correct?
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