Statistics Solutions

[Steps Shown] The computer science aptitude test, x, and the achievement score, y (as measured by a comprehensive final), were measured for 20 students in

Question: The computer science aptitude test, x, and the achievement score, y (as measured by a comprehensive final), were measured for 20 students in a beginning computer science course, given below:

X	4	16	20	13	22	21	15	20	19	16
Y	19	19	24	36	27	26	25	28	17	27

X	18	17	8	6	5	20	18	11	19	14
Y	21	24	18	18	14	28	21	22	20	21

Find the line of best fit.
Draw a scatterplot for the set of data.
Compute the linear correlation coefficient, r. Does it indicate a strong linear relationship? Explain your choice.
Predict the achievement score when the aptitude test score is 13.
Find the standard error of estimate.
Find the residual for the achievement score when the aptitude test score is 13.
Is the point (4, 19) an influential point for the set of data? Is it an outlier?

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[Steps Shown] The computer science aptitude test, x, and the achievement score, y (as measured by a comprehensive final), were measured for 20 students in

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X	4	16	20	13	22	21	15	20	19	16
Y	19	19	24	36	27	26	25	28	17	27

X	18	17	8	6	5	20	18	11	19	14
Y	21	24	18	18	14	28	21	22	20	21

X	4	16	20	13	22	21	15	20	19	16
Y	19	19	24	36	27	26	25	28	17	27

X	18	17	8	6	5	20	18	11	19	14
Y	21	24	18	18	14	28	21	22	20	21

X	4	16	20	13	22	21	15	20	19	16
Y	19	19	24	36	27	26	25	28	17	27

X	18	17	8	6	5	20	18	11	19	14
Y	21	24	18	18	14	28	21	22	20	21