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If a polling organization must be especially careful to represent all regions of the United States, which type of sampling plan is most useful: multi-stage sampling, cluster sampling, convenience sampling, or systematic sampling?
Statistics and Probability, Statistics
It has been a bad day for the stock market and you have heard that only 30% of all stocks gained value. Suppose you have a portfolio of 10 securities and assume a binomial distribution for the number of your stocks that ...
The probability of a California teenager owning a surfboard is 0.43, of owning a skateboard is 0.38, and of owning both is 0.28. If a California teenager is selected at random, find the probability that he or she owns a ...
Table 1. Fasting Blood FBS of Group A FBS of Group B 95 90 100 100 125 125 175 200 250 550 1. What is the mean fasting blood sugar value for each group? What is the median? Mode? Group A: mean:145, median: 125, mode: n ...
A medical researcher is interested in determining whether a new medication for lung cancer is effective in a group of patients with early-stage disease. Explain what a Type I and Type II error would be in this study. (Be ...
What is the sample size for studies with MOE of +/-3.5% and +/-2.8%, with a confidence level of 95%, sample statistics of 50. Suppose the category population was 7500 (less than 10,000)? Remember the FPC. What would be t ...
You are lost on the Mythy Island in the summer, when tourists are two-thirds of the population. If you ask a tourist for direction the answer is correct with probability ¾; answers to repeated questions are independent e ...
A study was conducted to evaluate the association between benzene exposure and leukemia. Employment records identified 10,000 workers who were occupationally exposed to benzene in the 1980s and 14,000 workers who were no ...
1) Is the magnitude of an earthquake related to the depth below the surface at which the quake occurs? Let x be the magnitude of an earthquake (on the Richter scale), and let y be the depth (in kilometers) of the qua ...
A sample of 175 randomly selected students, found that the proportion of students planning to travel home for thanksgiving is 0.64 What is the standard deviation of the sampling distribution.
If the data are pooled, the 48 "before" scores had an average of 7.48 and a standard deviation of 0.652. Assume that the "before" scores of people who have not seen any pictures has an average of 7.48 and a standard devi ...
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Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate
Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p
Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As
Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int
Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As