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7.) In the gambling game chuck-a-luck, for a $1 bet, it is possible to win $1, $2, or $3 with respective probabilities of 75/216, 15/216, and 1/216. One dollar is lost with a probability of 125/216. Let X equal the winnings for this game.a.) Find E(X). (Note that when a bet is won, the $1 that was bet is returned to the bettor in addition to the $1, $2, or $3 that is won, but the returned dollar does not count as part of the winnings.)
Find the left and right critical values from the appropriate table for a 95% confidence interval for the mean when the sample size is 23.
The mean number of cups was 5 with a standard deviation of 1.5 cups. The distribution was normal. What proportion of students drank 7 or more cups of coffee per day?
There are 8 men and 4 women in the math club. Four members are selected at random to attend a math conference. Determine the probability of selecting 2 men and 2 women.
Perform a regression analysis using compa as the dependent variable and the same independent variables as used in question 2. Show the result, and interpret your findings by answering the same questions.
A random sample of 25 injections resulted in a variance of 0.135 test if the apparatus has a greater variance than the desired one.
Support casinos in the sample? B) calculate a 95% confidence interval to estimate the population proportion of all residents who wupport casinos.
Evidence of statistical interaction or effect modification. What is the odds ratio for diabetes in a man aged 65 compared with a woman aged 60 (both have the same waist circumference)?
Your office has just received 128 insurance claims to be processed in the next few days. What is the probability that half or more of the claims have been padded?
Data from the Motor Vehicle Department indicate that 80% of all licensed drivers are older than age 25. In a sample of n=60 people who recently received speeding tickets, 38 were older than 25 years and the other 22 were age 25 or younger.
What is the probability that none of the next eight customers who order beer will order light beer? What is the probability that one customer will? What is the probability that two customers will?
Find the probability that the number who consider themselves baseball fans is (a) exactly eight, (b) at least eight, and (c) less than eight.
A health care professional wishes to estimate the birth weight of infants. How large a sample must she select if she desires to be 90% confident that the true mean is within 6 ounces of the sample mean?
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