Identify each of the following as a use of descriptive statistics or inferential statistics.
a. Finding the weights of a sample of 85 manufacturer parts.
b. Calculating the average weight of 125 boxes shipped by FedEx.
c. Estimating the percentage of the U.S. population that will vote for your favorite candidate in the next presidential election.
d. Selecting a random sample of 190 babies born last year and using this information to estimate the birth weight of all babies born last year.
e. Randomly selecting 225 cans of a brand of peas and using their average weight to decide whether the 15 oz. label on the cans is truthful or not.
Question 2
The numerical value of the coefficient of determination _____.
a. is always larger than the coefficient of correlation
b. is always smaller than the coefficient of correlation
c. is negative if the coefficient of determination is negative
d. can be larger or smaller than the coefficient of correlation
Identify the structures shown below by filling in the blanks.
Statistics Center (07/2016)
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