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Question: The average salary for a random sample of 49 new (less than 3 years) professors in psychology graduate departments in 2012 was $90,000. The population, all professors with all years of experience in psychology graduate departments across the country, earned an average salary of $110,960, with a standard deviation of $39,295. Did the average salary of the new full psychology professors differ from that of all psychology professors as a whole? Conduct the appropriate statistical test to answer this question.
accept on faith that the characteristic function of the cauchy distribution with density fx x 1?1x2 for ?? lt x lt ?
Imagine that the weather forecaster predicts that next Friday's temperature will be 82 degrees F. How many students would you expect to attend class on that day?
Using the table of random numbers in Appendix A-1, draw a stratified random sample of 10 boys and 10 girls from the given population:
Genetic defect. It's believed that 4% of children have a gene that may be linked to juvenile diabetes. Researchers hoping to track 20 of these children.
The original requirements of the sample. Explain the trade-offs that will occur when you lower the sample to $10,000 to meet the budget.
Suppose that the number of years a car will run is exponentially distributed with parameter µ = 1/4. If Prosser buys a used car today, what is the probability that it will still run after 4 years?
Assume you are conducting a meta-analysis over a set of five studies. The effect sizes for each study follows: d = 0.67; d = 0.03; d = 0.32; d = 0.59; d = 0.22.
Given route measured in terms of passengers carried (range is 0.1 to 1). Regress lfare on dist, passen and concen, and provide the heteroskedasticity-robust standard errors.
let x equal to the grade of a student in a stat course. suppose that x is nu 100. using the traditional method of
The margin of error for polling results is typically determined as the half-width of a 95% confidence interval. With respect to a particular ballot proposition
Johnson and Johnson offers a board range of personal hygiene and medical products, ranging from baby products, women's health and personal care
Suppose a national survey conducted among a simple random sample of 1534 American adults, 816 indicate that they think the Civil War is still relevant
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