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 Score (points) 32 9 16 4 19 23 16 (a) State the dependent (or response) variable for this situation 25 26 14 15 36 30
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 Score (points) 32 9 16 4 19 23 16 (a) State the dependent (or response) variable for this situation 25 26 14 15 36 30
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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Author:Carter
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Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
Problem 15PPS
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You did it wrong last time do it using a graphics calculator. For y=ax+b instead
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
Score (points) 32 19 23
19 9
(1)
16 4
(a) State the dependent (or response) variable for this situation
(c) Remove the outlier from the data set, and
16
25 26
(b) Which of the data points do you believe is the most likely to be an outlier?
14
15 36 30
X
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:Determine the coefficient of determination (²)
Complete the following sentence:
% of the variation in the score can be explained by the variation
Predict the score of a learner driver after 12 hours of instruction time to the nearest point
Predict the score of a learner driver after 50 hours of instruction time to the nearest point
Comment on the reliability of the predictions made in both parts (v) and (vi)
X
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