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1) What is correlation?
2) What is an example of two variables that are likely to be correlated because they are both changing over time?
Explain the effect that changes in η and β have on the shape of the Weibull density and the effect that they have on γ3 and derive an expression for the coefficient of skewness for the Weibull distribution.
The mean of a normal probability distribution is 60; the standard deviation is 5.
Create the estimated regression equation by calculating the values of b 0 and b 1
An article in Parenting magazine reported that 60% of Americans needed a vacation after visiting their families for the holidays. Suppose this is the true proportion of Americans who feel this way. A random sample of 100 Americans is taken.
Create the table for frequency distribution that has 16 class intervals of width 1 inch. Utilize 61.5 inches as lower limit of first interval and 62.5 as upper limit.
Research question : At α = . 01, is degree of certainty independent of credits earned?
The mean of a sample is 22.5. The mean of 1000 bootstrapped samples is 22.491. The bias of the bootstrap mean is
Determine what analysis would you do on each problem (i.e., one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)?
Using the data for women, complete an analysis of CHD incidence in women similar to the one completed for men.
Assume the least squares equation is Y' = 10 + 20X. What does the value of 20 indicate?
What percentage of population scored between the mean and Jorge?
Derive the probability distribution of the completion times - For each of the distribution in (i) above, calculate their relevant statistics. A task is known to have the following time to completion
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