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A correlation coefficient computed for n=18 and a=0.10 is r=0.692. . Using the t -test for the correlation coefficient, what are the critical values?
A) +1.734 B) +2.120 C) +1.746 D) +2.101
The height in inches of girls on a high school girls basketball team are as follows: Identify the z score used in a quantile plot for the player with a height of 66.5 inches.
The variance of the return per share is 4 for stock 1 and 100 for stock 2. The covariance of the return between the two stocks is 5 per share. Use the total variance of the investment as investment risk.
What is the probability that the device will detect at least one of the two shoppers entering together?
Construct a 96 percent confidence interval for the mean weight of all firefighters six months after the exercise rooms were installed.
Solve the mean and standard deviation equations
At α = .05, is there a difference in variances? Illustrate all steps clearly, including illustration of the decision rule.
A Tire company has developed a new type of tire. Extensive testing shows that the number of miles the new tire will run before wearing out is normally distrubuted with a mean of 40,000 miles and a standard deviation of 4,000 miles
A recent national study showed that approximately 30% of college students binge-drink. Let x equal the number of students in a random sample size of n=12 who binge drink. Find the probability that
What does a confidence interval tell us and why is it importance to use a confidence interval?
In the graphical method, how do you know when a problem is infeasible, unbounded, or when it has multiple optimal solutions? Give a real-world example of when you could have an infeasible problem.
A coin was flipped 60 times and came up heads 38 times. (a) At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations. (b) Calculate a p-value and interpret it.
According to the study, the mean age of a self-employed individual is 46.6 years with a standard deviation of 10.8 years.
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