Which one of these variables is a categorical variable?
a. Number of ear pierces a person has
b. Height of a person
c. Weight of a person
d. Opinion about legalization of marijuana
Q. 2Tallies and cross-tabulations are used to summarize which of these variable types?
a. Quantitative
b. Mathematical
c. Continuous
d. Categorical
Q. 3Gallup's standard of living measure reports the percentage of Americans who say their standard of living is getting better versus the percentage who say their standard of living is getting worse. Results are based on telephone interviews with approximately 3,000 national adults. The margin of error is reported as 2 percentage points. In January of 2011, 49 reported that their standard of living is getting better. Provide an interval of numbers that is 95 certain to cover the true percentage of Americans who report that their standard of living is getting better.
Q. 4Gallup's standard of living measure reports the percentage of Americans who say their standard of living is getting better versus the percentage who say their standard of living is getting worse. Results are based on telephone interviews with approximately 3,000 national adults. The margin of error is reported as 2 percentage points. In January of 2011, 49 reported that their standard of living is getting better. What is the approximate margin of error for this survey? Did the story report the correct margin of error?
Q. 5According to statistics published by the Centers for Disease Control and Prevention in January of 2011, 25.8 million people, or 8.3 of the U.S. population, are affected by either type 1 or type 2 diabetes. Suppose these results are based on hospital records of 10,000 patients. Provide an interval of numbers that is 95 certain to cover the true percentage of Americans who are affected by either type 1 or type 2 diabetes.
Q. 6According to statistics published by the Centers for Disease Control and Prevention in January of 2011, 25.8 million people, or 8.3 of the U.S. population, are affected by either type 1 or type 2 diabetes. Based on the numbers published by the CDCP, roughly how many people lived in the U.S. in January of 2011?
Quick Reply
