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Find the probability for Binomial distribution. Visits to Web sites. What kinds of Web sites do males aged 18 to 34 visit most often? Pornographic sites take first place, but about 50 percent of male Internet users in this age group visit an auction site such as eBay at least once a month. Interview a random sample of 15 male Internet users aged 18 to 34.
a) What is the distribution of the number who has visited an online auction site in the past month?
b) What is the probability that at least 8 of the 15 have visited an auction site in the past month?
The heights of young women are approximately normal with mean 65 inches and standard deviation 2.5 inches.
What is the standard deviation of expected returns for Stock X? For Stock Y?
The 99% confidence interval estimate for a population variance when a sample standard deviation of 12 is obtained from a sample of 10 items is:
For the 20 test scores shown, find the percentile rank for a score of 86.
From Group of 40 People, a jury of 12 people is selected. In how many various ways can a jury of 12 people be selected?
Find out equation of the line of best fit. Find out r - Is there a strong relationship?
To test whether there is a significant mean difference among the three.
Suppose the likelihood that any flight on Northwest Airlines arrives within 15 minutes of scheduled time is .90. We choose four flights from yesterday for study.
The manufacturer of a coffee dispensing machine claims the ounces per cup is normally distributed with population mean equal to 8 ounces and standard deviation equal to 0.9 ounces. If 50 cups of coffee were measured, what is the probability that.
What is the possibility that for a arbitrarily selected customer the service time could exceed 3 minutes?
Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks? Justify your answer.
Calculate descriptive statistics for each stock and the S&P 500. Comment on your results. Which stocks are the most volatile? Calculate the value of beta for each stock.
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