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Suppose we have a population of scores with a mean (μ) of 200 and a standard deviation (σ) of 10. Assume that the distribution is normal. Provide answers to the following questions:
1. What score would cut off the top 5 percent of scores?2. What score would cut off the bottom 5 percent of scores?3. What score would cut off the top 2.5 percent of scores?4. What score would cut off the bottom 2.5 percent of scores?
When is a regression equation used? What terms describe the fit of a regression equation to the data? What is the importance of the coefficient of determination (r2)?
What sample size is necessary for a study to determine the average cost of a child delivered at a local hospital within the past three months?
The question of interest is whether mean GPA is the same or differs for different weight attitude populations. Minitab output for the study is given above. The mean square error (MSE) in this study is:
The company offers a warranty of 1 year for the product. What percentage of the product sold by the company will need warranty service (that is, it will last less than 1 year)?
No information is available about its value. How large a sample size is needed to estimate it to within 0.15 with 99% confidence?
She asked her assistant for a 95% confidence interval, approximately how large a sample did her assistant use to determine the interval estimate?
In each of the following cases. find the mean , variance and standard of the sampling distribution of sample proportion p.
What is the probability that 0, 1, 2, or 3 hypertensives will be identi ed in such sibships if the hypertensive status of 2 siblings in the same family are independent events?
A small company that manufactures computers computer received 10 shipments of the chips in lots of 20 chips from the manufacturer. what is the probability that there will be 2 shipments with at least one defective chip?
Given the following revenue and cost function for a business firm, calculate the break-even quantity, total revenue, total cost and total profit at break-even level of production.
A car dealership is worried that Hondas are getting lower sales than Hyundai. Two independent random samples have been selected 630 observations from population 1 (Hondas) and 610 from population 2 (Hyundai).
A random sample of 90 printers discovered that 25 of them were being used in small businesses. Find the 95% limit for the population proportion of printers that are used in small buisnesses.
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