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IQ data is thought to be normally distributed with a mean of 100 and a standard deviation of 15. Using the emperical rule, what is the IQ range we would expect approximately 95% of the population to be?
Statistics and Probability, Statistics
David Barnes and his fiancée Valerie Shah are visiting Hawaii. There are 38 guests registered for orientation. It is announced that 20 randomly selected registered guests will receive a free lesson of the Tahitian dance. ...
An insurance company is selling a perpetuity contract that pays $2,00 monthly. The contract currently sells for $100,000. (a) What is the monthly return on this investment vehicle? (b) if instead the amount of monthly in ...
A researcher working at a particular company wants to know if workers' health would improve if they were given extra days 'off. In this company, all workers undergo a standard physical exam twice a year and after each ex ...
An independent-measures study has one sample with n = 10 and a second sample with n = 15 to compare two experimental treatments. What is the df value for the t statistic for this study?
Suppose that systolic blood pressure for 35- to 44-year-olds is normally distributed with mean 125 in mm Hg and standard deviation 10 in mm Hg. What proportion of individuals will have a blood pressure reading between 12 ...
A. Fifteen percent of the U.S. population is greater than 65 years of age. If a sample of 100 persons is chosen, what is the probability that fewer than 10 are more than 65 years old? B. In a sample of size 100 from the ...
Suppose we can only sample from Uniform distribution (0,1) with k=3. Design an algorithm to simulate chi-square distribution with 2k freedom via general transformation method.
An? e-commerce Web site claims that 8?% of people who visit the site make a purchase. Complete parts a through e below based on a random sample of 15 people who visited the Web site. a. What is the probability that none ...
A box contains 14 large marbles and 11 small marbles. Each marble is either green or white. 8 of the large marbles are green, and 5 of the small marbles are white. If a marble is randomly selected from the box, what is t ...
A firm requires an investment of $18,000 and will return $26,000 after one year. If the firm borrows $10,000 at 8% what is the return on levered equity?
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