Question
1. Which of the following statements is true? Select one: a. If a regression equation does not appear to be useful for making predictions, there
1.
Which of the following statements is true?
Select one:
a.
If a regression equation does not appear to be useful for making predictions, there is no way to estimate y.
b.
If a regression equation does not appear to be useful for making predictions, the best estimator for y is the sample mean.
c.
If you find statistical significance based onrfor a correlation between two variables, there is no need to inspect a scatterplot.
2.
Use the Excel file "Bear Measurements" to calculate the linear correlation (r) for the variables of Chest and Weight.
Select one:
a.
It is impossible to know if these two variables have a statistically significant relationship with the information given.
b.
There is a low probability that these two variables have a statistically significant relationship.
c.
There is a high probability that these two variables have a statistically significant relationship.
3.
Use the Excel file "Bear Measurements." What is the regression equation?
Select one:
a.
y = 1.6455x +24.792
b.
x = 1.6455y - 24.792
c.
x = 24.792y - 1.6455
| AGE | MONTH | SEX (1=M) | HEADLEN | HEADWDTH | NECK | LENGTH | CHEST | WEIGHT |
| 19 | 7 | 1 | 11.0 | 5.5 | 16.0 | 53.0 | 26.0 | 80 |
| 55 | 7 | 1 | 16.5 | 9.0 | 28.0 | 67.5 | 45.0 | 344 |
| 81 | 9 | 1 | 15.5 | 8.0 | 31.0 | 72.0 | 54.0 | 416 |
| 115 | 7 | 1 | 17.0 | 10.0 | 31.5 | 72.0 | 49.0 | 348 |
| 104 | 8 | 0 | 15.5 | 6.5 | 22.0 | 62.0 | 35.0 | 166 |
| 100 | 4 | 0 | 13.0 | 7.0 | 21.0 | 70.0 | 41.0 | 220 |
| 56 | 7 | 1 | 15.0 | 7.5 | 26.5 | 73.5 | 41.0 | 262 |
| 51 | 4 | 1 | 13.5 | 8.0 | 27.0 | 68.5 | 49.0 | 360 |
| 57 | 9 | 0 | 13.5 | 7.0 | 20.0 | 64.0 | 38.0 | 204 |
| 53 | 5 | 0 | 12.5 | 6.0 | 18.0 | 58.0 | 31.0 | 144 |
| 68 | 8 | 1 | 16.0 | 9.0 | 29.0 | 73.0 | 44.0 | 332 |
| 8 | 8 | 1 | 9.0 | 4.5 | 13.0 | 37.0 | 19.0 | 34 |
| 44 | 8 | 0 | 12.5 | 4.5 | 10.5 | 63.0 | 32.0 | 140 |
| 32 | 8 | 1 | 14.0 | 5.0 | 21.5 | 67.0 | 37.0 | 180 |
| 20 | 8 | 0 | 11.5 | 5.0 | 17.5 | 52.0 | 29.0 | 105 |
| 32 | 8 | 1 | 13.0 | 8.0 | 21.5 | 59.0 | 33.0 | 166 |
| 45 | 9 | 1 | 13.5 | 7.0 | 24.0 | 64.0 | 39.0 | 204 |
| 9 | 9 | 0 | 9.0 | 4.5 | 12.0 | 36.0 | 19.0 | 26 |
| 21 | 9 | 1 | 13.0 | 6.0 | 19.0 | 59.0 | 30.0 | 120 |
| 177 | 9 | 1 | 16.0 | 9.5 | 30.0 | 72.0 | 48.0 | 436 |
| 57 | 9 | 0 | 12.5 | 5.0 | 19.0 | 57.5 | 32.0 | 125 |
| 81 | 9 | 0 | 13.0 | 5.0 | 20.0 | 61.0 | 33.0 | 132 |
| 21 | 9 | 1 | 13.0 | 5.0 | 17.0 | 54.0 | 28.0 | 90 |
| 9 | 9 | 1 | 10.0 | 4.0 | 13.0 | 40.0 | 23.0 | 40 |
| 45 | 9 | 1 | 16.0 | 6.0 | 24.0 | 63.0 | 42.0 | 220 |
| 9 | 9 | 1 | 10.0 | 4.0 | 13.5 | 43.0 | 23.0 | 46 |
| 33 | 9 | 1 | 13.5 | 6.0 | 22.0 | 66.5 | 34.0 | 154 |
| 57 | 9 | 0 | 13.0 | 5.5 | 17.5 | 60.5 | 31.0 | 116 |
| 45 | 9 | 0 | 13.0 | 6.5 | 21.0 | 60.0 | 34.5 | 182 |
| 21 | 9 | 1 | 14.5 | 5.5 | 20.0 | 61.0 | 34.0 | 150 |
| 10 | 10 | 1 | 9.5 | 4.5 | 16.0 | 40.0 | 26.0 | 65 |
| 82 | 10 | 0 | 13.5 | 6.5 | 28.0 | 64.0 | 48.0 | 356 |
| 70 | 10 | 0 | 14.5 | 6.5 | 26.0 | 65.0 | 48.0 | 316 |
| 10 | 10 | 1 | 11.0 | 5.0 | 17.0 | 49.0 | 29.0 | 94 |
| 10 | 10 | 1 | 11.5 | 5.0 | 17.0 | 47.0 | 29.5 | 86 |
| 34 | 10 | 1 | 13.0 | 7.0 | 21.0 | 59.0 | 35.0 | 150 |
| 34 | 10 | 1 | 16.5 | 6.5 | 27.0 | 72.0 | 44.5 | 270 |
| 34 | 10 | 1 | 14.0 | 5.5 | 24.0 | 65.0 | 39.0 | 202 |
| 58 | 10 | 0 | 13.5 | 6.5 | 21.5 | 63.0 | 40.0 | 202 |
| 58 | 10 | 1 | 15.5 | 7.0 | 28.0 | 70.5 | 50.0 | 365 |
| 11 | 11 | 1 | 11.5 | 6.0 | 16.5 | 48.0 | 31.0 | 79 |
| 23 | 11 | 1 | 12.0 | 6.5 | 19.0 | 50.0 | 38.0 | 148 |
| 70 | 10 | 1 | 15.5 | 7.0 | 28.0 | 76.5 | 55.0 | 446 |
| 11 | 11 | 0 | 9.0 | 5.0 | 15.0 | 46.0 | 27.0 | 62 |
| 83 | 11 | 0 | 14.5 | 7.0 | 23.0 | 61.5 | 44.0 | 236 |
| 35 | 11 | 1 | 13.5 | 8.5 | 23.0 | 63.5 | 44.0 | 212 |
| 16 | 4 | 1 | 10.0 | 4.0 | 15.5 | 48.0 | 26.0 | 60 |
| 16 | 4 | 1 | 10.0 | 5.0 | 15.0 | 41.0 | 26.0 | 64 |
| 17 | 5 | 1 | 11.5 | 5.0 | 17.0 | 53.0 | 30.5 | 114 |
| 17 | 5 | 0 | 11.5 | 5.0 | 15.0 | 52.5 | 28.0 | 76 |
| 17 | 5 | 0 | 11.0 | 4.5 | 13.0 | 46.0 | 23.0 | 48 |
| 8 | 8 | 0 | 10.0 | 4.5 | 10.0 | 43.5 | 24.0 | 29 |
| 83 | 11 | 1 | 15.5 | 8.0 | 30.5 | 75.0 | 54.0 | 514 |
| 18 | 6 | 1 | 12.5 | 8.5 | 18.0 | 57.3 | 32.8 | 140 |
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access with AI-Powered Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started
Introduction To Probability And Statistics
Authors: William Mendenhall, Robert Beaver, Barbara Beaver
14th Edition
1133103758, 978-1133103752
