Statistics ITU Board 2080
Discuss the meaning of i. positive ii. negative iii. perfect correlation between two variables. The following show the improvement (gain in reading speed) of 8 students in a speed reading program…
10Discuss the meaning of i. positive ii. negative iii. perfect correlation between two variables. The following show the improvement (gain in reading speed) of 8 students in a speed reading program and the number of weeks they have been in program.
Number of weeks
4
5
3
9
7
10
4
5
Speed gain
85
120
48
192
164
234
74
110
a) Compute correlation coefficient and interpret its result.
b) Find the regression equation of speed gain on number of weeks.
c) Estimate speed gain of a student who has been in program for 6 weeks and interpret the slope of the line.
A worked answer is on its wayMeanwhile, read the Statistics I notes for this topic.
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