The effect of the amount of instruction on driving skill was tested by selecting at random 7 learner drivers. The learner drivers were given a score on a driving skills test. The number of hours of instruction for each learner was recorded. The results are shown in the table below. Hours of 19 9 16

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
Problem 15PPS
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Last time you didn’t answer question c,i) in terms of the variables of score and hours. Also write the answers in more depth
The effect of the amount of instruction on driving skill was tested by selecting at random 7 learner drivers.
The learner drivers were given a score on a driving skills test. The number of hours of instruction for each
learner was recorded.
The results are shown in the table below.
Hours of
instruction
19
9
(i)
16
4
Score (points) 32 19 23 16
(a) State the dependent (or response) variable for this situation
(c) Remove the outlier from the data set, and
25 26 14
(b) Which of the data points do you believe is the most likely to be an outlier?
15 36 30
Determine the equation for the least squares regression line and write it down in terms of
the variables score and hours. Give the coefficients correct to 2 decimal places.
Transcribed Image Text:The effect of the amount of instruction on driving skill was tested by selecting at random 7 learner drivers. The learner drivers were given a score on a driving skills test. The number of hours of instruction for each learner was recorded. The results are shown in the table below. Hours of instruction 19 9 (i) 16 4 Score (points) 32 19 23 16 (a) State the dependent (or response) variable for this situation (c) Remove the outlier from the data set, and 25 26 14 (b) Which of the data points do you believe is the most likely to be an outlier? 15 36 30 Determine the equation for the least squares regression line and write it down in terms of the variables score and hours. Give the coefficients correct to 2 decimal places.
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