Choosing a Test and Naming the Population(s) In each case, choose whether the appropriate test is a one-proportion z -test or a two-proportion z -test . Name the population(s). a. A researcher takes a random sample of 4-year-olds to find out whether girls or boys are more likely to know the alphabet. b. A pollster takes a random sample of all U.S. adult voters to see whether more than 50 % approve of the performance of the current U.S. president. c. A researcher wants to know whether a new heart medicine reduces the rate of heart attacks compared to an old medicine. d. A pollster takes a poll in Wyoming about homeschooling to find out whether the approval rate for men is equal to the approval rate for women. e. A person is studied to see whether he or she can predict the results of coin flips better than chance alone.
Choosing a Test and Naming the Population(s) In each case, choose whether the appropriate test is a one-proportion z -test or a two-proportion z -test . Name the population(s). a. A researcher takes a random sample of 4-year-olds to find out whether girls or boys are more likely to know the alphabet. b. A pollster takes a random sample of all U.S. adult voters to see whether more than 50 % approve of the performance of the current U.S. president. c. A researcher wants to know whether a new heart medicine reduces the rate of heart attacks compared to an old medicine. d. A pollster takes a poll in Wyoming about homeschooling to find out whether the approval rate for men is equal to the approval rate for women. e. A person is studied to see whether he or she can predict the results of coin flips better than chance alone.
Solution Summary: The author explains that the required test is a two-proportion and the populations are all 4-year-old girls and boys.
Choosing a Test and Naming the Population(s) In each case, choose whether the appropriate test is a one-proportion
z
-test
or a two-proportion
z
-test
.
Name the population(s).
a. A researcher takes a random sample of 4-year-olds to find out whether girls or boys are more likely to know the alphabet.
b. A pollster takes a random sample of all U.S. adult voters to see whether more than
50
%
approve of the performance of the current U.S. president.
c. A researcher wants to know whether a new heart medicine reduces the rate of heart attacks compared to an old medicine.
d. A pollster takes a poll in Wyoming about homeschooling to find out whether the approval rate for men is equal to the approval rate for women.
e. A person is studied to see whether he or she can predict the results of coin flips better than chance alone.
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