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A charity solicits donations by phone. From long experience the charity's director reports that 60 percent of the calls will result in refusal to donate, 30 percent will request more information via the mail, and 10 percent will result in an immediate credit card donation. For a sample of 200 calls last week, 140 refused to donate, 50 requested additional information, and 10 made an immediate donation. At the 0.10 significance level was the sample result different from the usual pattern? Show how to plug this in megastat and if it is chi square or anova.
The mean was 56 and the standard deviation was 20. On the second exam, she scored 82; the mean was 74 and the standard deviation was 5. On which exam did she do better?
The two cars drove a combined total of 1450 miles, and the sum of their fuel efficiencies was 40 miles per gallon. What were the fuel efficiencies of each of the cars that week?
A random sample of 100 entering freshmen is selected. What is the distribution of the mean composite ACT score, for the University?
The mean of a normal probability distribution is 60; the standard deviation is 5.
Assume that a hand of 12 cards is dealt from a normal deck of 52 playing cards. What is the probability that of the 12 cards, 3 will be diamonds, 3 will be clubs, 3 will be spades, and 3 will be hearts.
Research by the Illinois Banking Company revealed that only 10 percent of their customers wait more than five minutes to do their banking. Management considers this reasonable and will not add more tellers unless the proportion becomes larger than..
Identify the population parameter of interest in the survey. Give a point estimate of the population parameter. Set up H0 and Ha for testing whether the true percentage of TV viewers who find cable news to be better quality than network news differs..
A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%.
Construct a frequency distribution that has 5 classes, and draw:
The traveling salesperson randomly selects 5 apartments in your building to visit. What is the probability that she visits both you and your neighbor bill?
At 1 excavation site 8641 pot shards have been found that have not presently been cleaned also identified. Define the probability.
In an online survey of 4001 respondents, 8% were classified as productivity enhancers who are comfortable with technology and use the internet for its practical value. Suppose you select a sample of 400 students at your school, and the population ..
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