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From the relationship between the chi-squared random variable and the gamma random variable, prove that the mean of the chi-squared random variable is v and the variance is 2v.
A personnel manager has a computer-generated list of all employees that indicates that 70 percent are full-time employees, 20 percent are part-time employees, and 10 percent are furloughed or laid-off employees.
The CEO of ABC manufacturing commissioned a study to look at the differences between the current salaries of her employees (n = 474) and their starting salaries.
what are the confidence limits for the proportion that plan to vote for the Democratic incumbent?
Determine the point estimate of difference between mean fuel efficiency rating for midsize cars and large cars? Calculate p-value for the hypothesis test.
let y1 y2 y3 and y4 constitute a random sample of size n 4 from a bernoulli population with parameter p. a determine
a major retail clothing store is interested in estimating the difference in mean monthly purchases by customers who use
Each time marksman i fires he hits the target,independently of the past, with probability P i,i=1,2,3. Determine the proportion of time, in the long run, that each marksman shoots.
it is estimated that 68 of the voters in the city are against a new sales tax. if 20 voters are selected at random
joe is trying to determine how much bird feed he needs to buy. while the sun is up the average number of birds that fly
Volunteers at a teenage distress center have been assigned based on their skills and expertise. It's assumed that 40% are drug related, 25% sex related, 25% stress, and 10% education. For the study sample of 120 calls per month were categoruzed as fo..
The factorial structure of treatments. What does this plot recommend about suitability of no-interaction assumption here?
Discuss the concept of statistical significance, including your understanding of what it means, why it is important, and how it can be used.
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