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A gambler places one $20 bet on 3 football games and has a 50% chance of winning his bet on each game. The bookie keeps his $20. The gambler is paid later as follows, depending on the number of winners he picked. What is his expected gain? Remember, a loss is a negative gain, and that the bookie keeps the gambler's $20.
Normal approximation to the Binomial distribution - Evaluate the probability that at least 195 of the students are female.
Find the t c for a 90% confidence level with a sample size of 18.
A random sample of 36 days yielded the average daily output of 890.2 tons, with standard deviation of 19.8 tons. Use this information to make a 95% confidence interval for mean.
What is the probability that the mean life-span of a sample of 64 randomly selected bulbs will exceed 727 hours?
he population consists of all 15 year olds living in the attendance district of a local high school. You plan to obtain a simple random sample of 200 such residents by using the roster of the high school as the sampling frame.
From her district, consisting of several hundred stores, she selects a random sample of 30 stores. For each store she gathered the following information.
Which of the following would have a binomial distribution and evaluate the binomial coefficient
To select a _________ sample, an intact group of subjects that represent the population is selected.
Illustrate what was the lowest score earned on the exam. Explain how many students scored within 3 standard deviations of the mean.
The result for University X was a mean of 5 hours and an estimated population variance of 2 hours; for University Y; and for University Z. What should you conclude? Use the .05 level. What should you conclude? Use the .05 level.
A normal distribution with a mean of 55 and a standard deviation of 6 is evaluated to solve a business problem.
Calculate the test statistic. Determine the p-value of the test-statistic.
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