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According to BusinessWeek, the Standard & Poor's 500 Index posted an average gain of 13% for 2006.
If a random sample of 50 stocks from this index reveals an average gain of 11% and standard deviation of 6%, can you reject the magazine's claim in a two-tailed test? What is your p-value?
In a separate visit to the restaurant, the dining-column journalist is accompanied by three colleagues. Each person orders one hamburger. What is the probability that at least 2 of these 4 customers will get a hamburger that had a pre-cooked weigh..
Which of the following is a major difference between the binomial and the hypergeometric distributions?
you draw two cards from a standard deck of 52 cards without replacing the first one before drawing the second. find the
the foreman at a large plant estimates that there are defective parts about 1 of the time. if the plant produces 20000
a) What are the mean and standard deviation of the team times? b) Suppose that the teams best time to date is 9.9 minutes. What is the probability that the team beats its own best time?
What is the maximum likelihood estimate of μ? What is an approximate standard error of the maximum likelihood estimate?
What is the probability that the drug will be effective for 3 hours or more?
Generate a 95% confidence interval for the true mean total cholesterol levels in children.
What are the two variables in this study? Which one is the independent variable and which is the dependent variable? How do you know? Explain briefly.
Compared for 5 randomly selected days at three plants. Does the data prove a significant difference in mean scrap rates? Which pairs of mean scrap rates differ significantly (3 plants)?
Interpret the sign of each of the regression coef?cients given in the table. For EI/predicted BMR, data values ranged between 1.4 and 2.8 with a low value associated with underreporting of energy intake.
sample proportion and probability based on normal distribution.a nationwide study in 2003 indicated that about 60 of
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