A linear regression equation is calculated for a sample of n = 20 pairs of X and Y values. What would be the df value for the standard error of estimate?
A) 1?
B) ?2
C) ?18
D) ?19
C
You might also like to view...
You visit your family doctor, complaining of migraine headaches. The doctor says that your headaches are psychosomatic. He further explains that that means your headaches are just imagined and are not real. So he tells you to go home and stop worrying. Given your knowledge of stress, you correctly conclude:
A. migraine headaches are only psychological B. your doctor doesn't know what he is talking about C. your doctor is well-trained D. your doctor's definition of psychosomatic is correct, but he should have given you some medication
In its most basic form, the __________ the levels of interest of the independent variable
a. experimental group does not receive b. control group does not receive c. both the experimental and the control group do not receive d. both the experimental and the control group receive
A correlational technique that allows an investigator to assess the relationship between two variables by eliminating the influence of other variables is called a(n):
a. error correlation. b. crystal correlation. c. elimination correlation. d. partial correlation.
Cortical thickening peaks around the age of
A. 18 months. B. 11 to 12 years. C. 18 to 25 years. D. 45 years.