Multiple Choice
Dr.Johnson is studying the effects of aspirin on heart rate.He believes that aspirin will lower heart rate.He has 2 groups the treatment group receives 80mg of aspirin for a week (n=4) the control group received a placebo (n=4) and their heart rates are compared.Below is his data in which heart rate is beats per minute.He sets his alpha level at 0.05 and uses a directional test. 
What is the t-value for the data above?
A) 4.20
B) 4.19
C) 3.91
D) None of these
Correct Answer:
Verified
Correct Answer:
Verified
Q25: Unexplained variance or error variance reflects the
Q29: The test used to determine homogeneity of
Q37: If the assumption of homogeneity of variance
Q63: When researchers fail to present the value
Q66: In practice,we typically know the values of
Q77: The mean of the sampling distribution of
Q100: The nature of the relationship is determined
Q115: What assumption is made so that the
Q120: Whereas the sum of squares total reflects
Q143: What does a t value represent?