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Fifteen people showed up to the Math Lab on Monday night. I want to give prizes to three of those students. a. How many ways can I choose three people to receive an A on their final? b. How many ways can three people be picked where the first person gets an A on the final, the second person gets 10 extra credit points and the third gets a free calculator? c. How many ways can three people be chosen so that the first two people get an A on the final and the third gets extra credit.
Items are selected and tested in succession. Under the usual assumptions for Bernoulli trials, what is the probability the third satisfactory unit?
A standard deviation of 218 KWh. For a randomly selected home, find the probability that the February energy consumption level is greater than 1,000 KWh.
Standard deviation of the population is 9 hours. Give the null and alternative hypotheses. Compute the test and p-value. Use a=0.01 to make your conclusion based on the p-value.
For each of the following, indicate whether the appropriate variable would be qualitative or quantitative. If you identify the variable as quantitative, indicate whether it would be discrete or continuous.
1. in a random sample of 24 people the mean number of books they had read in the past year was 11.22 books and the
By using the age midpoints x and the percentages of nurses, do we have a valid probability distribution? Describe.
The mean tar content of a simple random sample of 25 unfiltered king size cigarettes is 21.1 mg, with a standard deviation of 3.2 mg.
A bag contains 5 red balls numbered 1, 2, 3, 4, 5 and 9 white balls numbered 6, 7, 8, 9, 10, 11, 12, 13, 14.
Commercial A was selected by 45 out of 100 women and 80 out of 140 men. A large-sample 95% confidence interval for this difference is?
In cohort studies of the role of a suspected factor in the etiology of a disease, it is essential that: The exposed and non-exposed groups under study be as similar as possible with regard to possible confounding factors.
Suppose two servings of lean meat are selected at random. Find the exact probability distribution for the sample median amount of saturated fat, X¯.
the rayleigh probability density function is the special case of the weibull probability density function when u03b1
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