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If sample data result in a linear correlation coefficient of r = 0.400, what proportion of the variation in y is explained by the linear relationship between x and y?
0.6325
0.3675
84%
16%
none of the above.
what is the formula of t-quantile distribution needed to calculate an exact 90 confidence interval for the
1. The counselor calculates the unbiased estimate of the population's variance to be 15. What is the variance of the distribution of means?
What is the shape mean and standard deviation of the resulting distribution of the sample mean? What is the probability that the mean of the sample of 42 is more than 52 hours?
Determine the conditions under which you would use a discrete probability distribution rather than a continuous probability distribution. Provide one (1) example to illustrate your reasoning.
Find out the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect? What percent of the garages take between 29 hours and 34 hours to erect?
Can you can tell the difference between coke and pepsi in a blind taste test? Most people say they can and have a preference for one brand or another.
if a data set has correlation coefficient equal to 0.9 which of the following is necessarily true about the data points
(a) At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule. (b) Is this a close decision?
In a random sample of 26 people, the mean number of books they had read in the past year was 14.93 books and the standard deviation was 16.60 books.
In Eurelia there are three categories of bicycle license, with different fees for each. The table below is based on a random sample of 122 Eurelian bicycle-license holders.
An aircraft manufacturer is attempting to determine if the average leg length of the adult male has changed from 44". A sample of 81 men was selected randomly
Is contamination with the two kinds of bacteria disjoint? Explain. (c) Is contamination with the two kinds of bacteria independent? Explain.
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