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An investigator wants to design a study to estimate the difference in the proportions of men and women who develop early onset cardiovascular disease (defined as cardiovascular disease before age 50). A study conducted 10 years ago found that 15% and 8% of men and women, respectively, developed early onset cardiovascular disease. How many men and women are needed to generate a 95% confidence interval estimate for the difference in proportions with a margin of error not exceeding a 4%?
Conduct a test to determine whether blood lactate level (y) is linearly related to perceived recovery (x). Use alpha = .05. Find the p-value for testing the hypotheses you gave in the previous problem. Show all decimal places in your answer.
A quality control inspector selects a part to be tested. The part is then declared acceptable, repairable, or scrapped. Then another part is tested. List the possible outcomes of this experiment regarding two parts.
A statistics professor would like to determine whether students in the class showed improved performance on the final exam as compared to the midterm examination.
The average amount of time between a score by either team in college soccer games is 15.2 minutes.
Locate value of the population mean in your sketch and make an estimate of the standard deviation
Florida consumers are confident about the economy. verify the 90% confidence interval. State in a sentence the meaning of the derived confidence interval .494, .568. What would be your conclusion?
Assume a mean wage of $1,000 and standard deviation of $100. What's the probability of finding an employee with a wage of between $790 and $1000?
Let's play a game. An urn contains five red, four green and one gold ball other than color, the balls are identical. You are blindfolded and allowed to pick a ball from the urn. Red pays $5, green pays $10 and gold pays $50.
For the sheet-metal stamping machine in certain factory, the time between failures, X1 has a mean between the failures, of 56 hours and a variance of 16 hours.
A new president at Big State University has made student satisfaction with the enrollment and registrations process one of her highest priorities.
The simple random sample is n = 14, σ = 12.5 and the original population is normally distributed.
In a shipment of 79 vials, only 17 do not have hairline cracks. If you randomly select 3 vials from the shipment, what is the probability that all 3 of the selected vials have hairline cracks?
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