5.60) A multimedia statistics learning system includes a test of skill in using
ID: 3022305 • Letter: 5
Question
5.60) A multimedia statistics learning system includes a test of skill in using the computer’s mouse. The software displays a circle at a random location on the computer screen. The subject clicks in the circle with the mouse as quickly as possible. A new circle appears as soon as the subject clicks the old one. The table below gives data for one subject’s trials, 20 with each hand. Distance is the distance from the cursor location to the center of the new circle, in units whose actual size depends on the size of the screen. Time is the time required to click in the new circle, in milliseconds. We suspect that time depends on distance. Make a scatterplot of time against distance, using separate symbols for each hand.
Time Distance Hand
115 190.7 right
96 138.52 right
110 165.08 right
100 126.19 right
111 163.19 right
101 305.66 right
111 176.15 right
106 162.78 right
96 147.87 right
96 271.46 right
95 40.25 right
96 24.76 right
96 104.8 right
106 136.8 right
100 308.6 right
113 279.8 right
123 125.51 right
111 329.8 right
95 51.66 right
108 201.95 right
240 190.7 left
190 138.52 left
170 165.08 left
125 126.19 left
315 163.19 left
240 305.66 left
141 176.15 left
210 162.78 left
200 147.87 left
401 271.46 left
320 40.25 left
113 24.76 left
176 104.8 left
211 136.8 left
238 308.6 left
316 279.8 left
176 125.51 left
173 329.8 left
210 51.66 left
170 201.95 left
Data set
Step 1:
Based on the results of the scatter plot, what would be a better guess?
The subject is left handed.
The subject is right handed.
Step 2:
Find the regression line of time on distance separately for each hand. Draw these lines on your plot. Which of the below will be used to measure the success of a regression for each hand, in terms of which data set gives better predictions?
The regressions' slope.
The regressions' intercept.
The regressions' r2.
Enter the number(s) of the choice(s) you wish to select. Separate multiple selections with commas or semicolons. Your selections:1,2
Step 3:
Find r2 for left hand and right hand.
1. 0.318
4. 0.305
2. 0.001
5. 0.215
3. 0.101
6. 0.093
Enter the number of the term that corresponds to each choice:
Left Hand
Right Hand
Step 4:
Based on your previous numerical results, which regression does a significantly better job of predicting time from distance?
The regression for the right hand.
Both have more or less the same predictive power.
The regression for the left hand.
Start: 2:07 PM
5.60) A multimedia statistics learning system includes a test of skill in using the computer’s mouse. The software displays a circle at a random location on the computer screen. The subject clicks in the circle with the mouse as quickly as possible. A new circle appears as soon as the subject clicks the old one. The table below gives data for one subject’s trials, 20 with each hand. Distance is the distance from the cursor location to the center of the new circle, in units whose actual size depends on the size of the screen. Time is the time required to click in the new circle, in milliseconds. We suspect that time depends on distance. Make a scatterplot of time against distance, using separate symbols for each hand.
Time Distance Hand
115 190.7 right
96 138.52 right
110 165.08 right
100 126.19 right
111 163.19 right
101 305.66 right
111 176.15 right
106 162.78 right
96 147.87 right
96 271.46 right
95 40.25 right
96 24.76 right
96 104.8 right
106 136.8 right
100 308.6 right
113 279.8 right
123 125.51 right
111 329.8 right
95 51.66 right
108 201.95 right
240 190.7 left
190 138.52 left
170 165.08 left
125 126.19 left
315 163.19 left
240 305.66 left
141 176.15 left
210 162.78 left
200 147.87 left
401 271.46 left
320 40.25 left
113 24.76 left
176 104.8 left
211 136.8 left
238 308.6 left
316 279.8 left
176 125.51 left
173 329.8 left
210 51.66 left
170 201.95 left
Data set
Step 1:
Based on the results of the scatter plot, what would be a better guess?
The subject is left handed.
The subject is right handed.
Step 2:
Find the regression line of time on distance separately for each hand. Draw these lines on your plot. Which of the below will be used to measure the success of a regression for each hand, in terms of which data set gives better predictions?
The regressions' slope.
The regressions' intercept.
The regressions' r2.
Enter the number(s) of the choice(s) you wish to select. Separate multiple selections with commas or semicolons. Your selections:1,2
Step 3:
Find r2 for left hand and right hand.
1. 0.318
4. 0.305
2. 0.001
5. 0.215
3. 0.101
6. 0.093
Enter the number of the term that corresponds to each choice:
Left Hand
Right Hand
Step 4:
Based on your previous numerical results, which regression does a significantly better job of predicting time from distance?
The regression for the right hand.
Both have more or less the same predictive power.
The regression for the left hand.
Explanation / Answer
1)
The subject is left handed.
2)
The regressions' r2.
3)
Left hand
5. 0.215
Right hand
0.093
4)
Both have more or less the same predictive power.
The subject is left handed.
2)
The regressions' r2.
3)
Left hand
5. 0.215
Right hand
0.093
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.