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A hypothetical statistics author is obsessed with making 10-foot putts. Each day that he practices, he putts 60 times and counts the number he makes. Over the last 20 practice sessions, he has averaged 24 made putts. What is the probability that he will make at least 30 putts during his next session?
the life expectancy of computer terminals is normally distributed with a mean of 4 years and a standard deviation of 10
The diameters of peaches in a certain orchard are normally distributed with a mean of 5.10 inches and a standard deviation of 0.40 inches.
1. Let X and Y be independent random variables from an exponential distribution with common parameter θ = 1. Show that X/Y has an F -distribution. What is the number for degrees of freedom?
assume that each vehicle passing a speed trap on i-44 between rolla and st. louis will be exceeding 90 mph with
When 319 college students are arbitarily selected and surveyed, it is observed that 120 own a car. Determine a 99% confidence interval for true proportion of all college students who own a car.
What is the predicted values of the fund in the period t = 1? What is the predicted value of the fund in the period 3, and period 7?
You are assigned to be part of a team of three analysts of a global management consulting company where of the entire work force of analysts. 55% have had no experience in telecommunications
a major chain of food stores wants to determine the proportion of customers who buy on impulse. the company decided to
a survey of adults ages 18-29 found that 82 use the internet. you randomly select 196 adults ages 18-29 and ask them if
In an ABCNews.com nationwide poll done in 2001, the proportion of respondents who thought that it should be illegal to use a hand held cell phone while driving a car was 69 %. The poll's sample was 1027.
Consider an urn that contains 40 balls. Of these 20 are red, 10 are green, and the remaining are blue. What is the probability that if nine balls are randomly selected from the urn then exactly three are of each color?
a random sample of n 25 scores is selected from a normal population with a mean 40. after a treatment is
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