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29?% of college students say they use credit cards because of the rewards program. You randomly select 10 college students and ask each to name the reason he or she uses credit cards. Find the probability that the number of college students who say they use credit cards because of the rewards program is? (a) exactly? two, (b) more than? two, and? (c) between two and five inclusive. If? convenient, use technology to find the probabilities.
?(a) ?P(2)= ?(Round to the nearest thousandth as? needed.)
?(b) ?P(x greater than>?2) = ?(Round to the nearest thousandth as? needed.)
?(c) ?P(2 less than or equals ≤x less than or equals ≤? 5)= ?(Round to the nearest thousandth as? needed.)
Best's Review (June 1999) compared the mortgage loan portfolios for a sample of 25 life health insurance companies. The information in the table on page 629 is extracted from the article.
Biting an unpopped kernel of popcorn hurts! As an experiment, a self-confessed connoisseur of cheap popcorn carefully counted 773 kernels and put them in a popper.
One school found that 28.6% of all students are liberal. You wonder whether this percentage is different at your school, but don't know whether it's higher or lower. What hypotheses will you test to see if your school significantly differs from th..
A clinical study was performed to determine if a product was effective in alleviating side effects caused by a mode of treatment. In the treated group (100 subjects) it was found that 10% had side effect A, 15% had side effect B and 65% had side eff..
Suppose a computer chip manufacturer rejects 2% of the chips produced because they fail presale testing. Assuming the bad chips are independent, find the probability of each of the following.
A pie chart shows the market shares of cola products. The "slice" for Pepsi-Cola has a central angle of 90 degrees. What is its market share?
In a known population of patients with severe anxiety disorder, anxiety is normally distributed µ=122, and s= 8. What is the estimated effect size.
The next 20% a B, the next 42% a C, the next 18% a D and the bottom 12% an F. What average must you exceed to obtain an A?
If a price decrease from $7 to $5 causes quantity demanded to increases from 100 to 150, what is the absolute value of the own price elasticity at a price of $5
The attention span of a two year-old is normally distributed with a mean of about 9 minutes and a standard deviation of 1.75 minutes. Suppose we randomly survey 60 two year-olds. What is the probability that a two year old has an attention span of..
1. Which of the following statements is true about a design of experiments methodology?
A study of sterility in the fruit fly ("Hybrid Dysgenesis in Drosophila melanogaster: The Biology of Female and Male Sterility," Genetics, 1979: 161-174) reports the following data on the number of ovaries developed by each female fly in a sample ..
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