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If when determining the cross-products for your correlation coefficient, positive z scores on one variable go with negative z scores on the other variable and negative z scores on one variable go with positive z scores on the other variable, the correlation coefficient will be:
negative
strong
weak
positive
Test research hypotheses that there is a difference in level of education between liberals and conservatives, set alpha at .01. Would your decision have been different if alpha were set at .05?
a a conservationist is interested in knowing whether polar bears in the wild have lower rates of reproduction than
an offspring of a grey cat is grey with probability 0.6 and white with probability 0.4. an offspring of a white cat is
suppose a simple random sample of size 43 is selected from a population with sigma 8. find the value of the standard
test at the 0.01 level, was the mean time for the Delta visits significantly less than that for the British Airway visits? Identify and interpret the p-value for the test.
Let X be the cost of the sofa. What is the average cost of a sofa if the advertised sofa is $250 and the more expensive sofa is $ 375?
Which the maximum number is 69, what is the probability that the number of people who show up will exceed the capacity of the plane?
Assume the life of these light bulbs follows a normal distribution. Find the probability that a random sample of 100 light bulbs will have an average life between 1760 and 1775 hours.
The times required to assemble a product are normally distributed with a mean of 47.5 minutes and a standard deviation equal to 8.5 minutes. What percent of the assembly workers require: (do not include % symbol)
Determine the expected market return on $ 20,000 if the expected return on asset is 20%, its beta is 1.5, and the risk free rate is 5 percent?
Sample without replacement when testing batches of products. When sampling without replacement, should you use the multiplication rule for independent or dependent events.
Determine the distribution of X? Determine its parameters?
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