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Use the following results obtained from a simple linear regression analysis with 12 observations.
Y'=37.2895-(1.2024)Xr2=.6744 sb(1)=.2934
Test to determine if there is a significant negative relationship between the independent and dependent variable at alpha=.05 and .01
She randomly samples 67 CFOs and finds that 40 of them get their money news from newspapers. Does the test show enough evidence to reject the findings of Robert Half International? Use a = .05.
A sample of n=20 has a mean of M=40. If the standard deviation is s=5, would a score of x=55 be considered an extreme value?
Illustrate that probability distribution of X satisfies properties of a discrete probability distribution.
Truck tire life is normally distributed with a mean of 60,000 miles and a standard deviation of 4,000 miles. You bought four tires. What is the probability that the average mileage of the four tires exceeds 66,000 miles?
Data on distribution of cost for building effort, design work and testing effort.
Test the claim that the actual percentage is 53%. Use a 0.10 significance level.
Which of the following studies used a participant observer approach?
A cell phone company collects data from a random sample of 500 households. The results indicate that 135 of the households would add an extra cellular number, provided it was offered at a reduced monthly cost.
Test hypothesis that people in State A are more depressed than U.S. population. Illustrate all of your hypothesis steps. (Use alpha = .01.)
Does this sample show sufficient evidence that the private university loan default rate is below the rate for all universities, using a left-tailed = .01. That is, do you reject the null hypothesis?
A point Y is selected at random from interval (0,1). Then another point X is chosen at random from the interval (0,Y). Find probability density function for X.
The negotiation will end successfully? After 4 hours? After 8 hours? How does the precentage likelihood of a successful negotiation change over the course of time?
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