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For a given year, the rate of return on all stocks was normally distributed, with a mean of 15% and a standard deviation of 8%.
(a) An investor randomly chose one stock at the beginning of the year to hold for the course of the year. What is the probability that the rate of return on this stock was at least 5%?
(b) Another investor randomly chose 20 stocks at the beginning of the year to hold for the course of the year. What is the probability that the average rate of return on these stocks was at least 5%?
radovilsky manufacturing company in hayward california makes flashing lights for toys. the company operates its
Probability of passing a student who guesses on every question is less than 0.10. What score should be set as the lowest passing grade if each question is worth one point?
Would the two-sample test provide evidence that the population mean is negative?
Assuming that students make their decisions independently, the number who accept has the B (1200, 0.75) distribution. If this number is less than 950, the college will admit students from its waiting list.
2- to 3-page critique of the article you found. In your critique, include responses to the following:
Purchasing Survey asked purchasing professionals what sales traits impressed them most in a sales representative. Seventy-eight percent selected "thoroughness."
Find the mean, median, mode, variance and standard deviation for the following data set:
Annoying phone calls. A newly hired telemarketer is told he will probably make a sale on about 12% of his phone calls. The first week he called 200 people.
recall the gas station example where y is the daily revenues from the gas station. suppose a random sample of 5 days
Construct a 90 % confidence interval estimate of the proportion of deaths in the week before the holiday to the total deaths in the week before and the week after the holiday.
Constructing the s chart. Calculate control limits for s, make an s chart, and comment on control of short-term process variation.
In how many ways can the sales representatives be chosen (a) if there are no restrictions and (b) selection must include one sales rep from each region.
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