grStudy Guide  Correlation and Regression
1.Regression is a statistical method used to describe the nature of the relationship between variables.
A)True
B)False
2.A positive relationship exists when both variables increase or decrease at the same time.
A)True
B)False
3.__________ is a statistical method used to determine whether a relationship between variables exists.
4.In a __________ relationship, as one variable increases, the other variable decreases, and vice versa.
5.A study was conducted to determine if there was a linear relationship between a person's age and his/her peak heart rate. Construct a scatter plot and determine what type of ...view middle of the document...

D)curvilinear 
10.The range of the correlation coefficient is from 0 to 1.
A)True
B)False
11.The rounding rule for the correlation coefficient uses two decimal places.
A)True
B)False
12.A correlation coefficient of 0.96 would mean that the values of increase as the values of decrease.
A)True
B)False
13.The population correlation coefficient is computed by using all possible pairs of data values taken from a population.
A)True
B)False
14.If there is a strong negative linear relationship between the variables, the value of __________ will be close to –1.
15.Which of the following does not explain a possible relationship between variables when the null hypothesis is rejected? 
A)direct causeandeffect 
B)reverse causeandeffect 
C)caused by a third variable 
D)negative effect 
16.Ten pairs of points yielded a correlation coefficient of 0.79. If , which of the following statements is correct if ? (Do not calculate a tvalue.) 
A)Because 0.79 is greater than 0.632, the null hypothesis is not rejected. 
B)Because 0.79 is greater than 0.632, the null hypothesis is rejected. 
C)Because 0.79 is greater than 0.602, the null hypothesis is not rejected. 
D)There is no correlation between the variables. 
17.The formula for the correlation coefficient is __________.
18.A study was conducted to determine if there was a relationship between the prices a nonmember of a club paid for various publications and the prices that a member paid for the same publications. Find the value of .NonmemberMemberPrice, Price, 58324222462032162519755835346348 
A)13,251 
B)93,624 
C)19,712 
D)9349 
19.A study was conducted to determine if there was a relationship between the prices a nonmember of a club paid for various publications and the prices that a member paid for the same publications. Determine the value of . NonmemberMemberPrice, Price, 58324222462032162519755835346348 
A)13,251 
B)93,624 
C)19,712 
D)9349 
20.A study was conducted to determine if there was a relationship between the prices a nonmember of a club paid for various publications and the prices that a member paid for the same publications. What is the value of the correlation coefficient? NonmemberMemberPrice, Price, 58324222462032162519755835346348 
A)0.762 
B)0.857 
C)0.679 
D)0.932 
21.Which of the following could not be the value of a correlation coefficient? A study was conducted to determine if there was a relationship between the prices a nonmember of a club paid for various publications and the prices that a member paid for the same publications. NonmemberMemberPrice, Price, 58324222462032162519755835346348 
A)–0.683 
B)0.197 
C)1.000 
D)–1.369 
Use the following to answer questions 2223:
The city...