04 May Question 10.25 out of 0.25 pointsIf one takes a sample of pairs of points over a narrow range of X or Y scores, w
Question
Question 1
0.25 out of 0.25 points
If one takes a sample of pairs of points over a narrow range of X or Y scores, what effect might this have on the value of r?
Question 2
0.25 out of 0.25 points
What is the slope for the points X1 = 30, Y1 = 50 and X2 = 25 and Y2 = 40?
Question 3
0.25 out of 0.25 points
A z distribution always is normally shaped.
Question 4
0.25 out of 0.25 points
In a linear relationship all the points must fall on a straight line.
Question 5
0.25 out of 0.25 points
It is possible to compute a coefficient of correlation if one is given _________.
Question 6
0.25 out of 0.25 points
A researcher wanted to know if the order in which runners finish a race is correlated with their weight. She conducts an experiment and the data are given below.
Finishing order
1
2
3
4
5
6
Weight (lbs)
110
114
112
108
116
113
What is the appropriate correlation coefficient for these data?
Question 7
0.25 out of 0.25 points
A raw score that is 1 standard deviation above the mean of the raw score distribution will have a z score of 1.
Question 8
0 out of 0.25 points
The standard deviation of the z distribution equals _________.
Selected Answer:
b.
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