MATH 225N Week 8 Assignment; Correlation Question-Answers 3
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$10.00
| Term | Fall 2020 |
| Institution | MATH 225N Statistical Reasoning for the Health Sciences |
| Contributor | Gbenga |
- Question: Which of the following data sets or plots could have a regression line with a negative slope? Select all that apply.
- Question: The scatter plot below shows the average cost of a designer jacket in a sample of years between 2000 and 2015. The least squares regression line modeling this data is given by yˆ=−4815+3.765x.
Interpret the slope of the least squares regression line.
- Question: The scatter plot below shows data for the average cost of a high-end computer (y, in dollars) in the year x years since 2000. The least squares regression line is given by yˆ=−1677+314x.
Interpret the slope of the least squares regression line.
- Question: Which of the following data sets or plots could have a regression line with a negative slope?
- Question: A survey regarding truck engines found a positive correlation between the size of the engine and horsepower the engine produces. Answer the following question based only on this information.
True or false: It can be concluded that trucks with larger engines have greater horsepower.
- Question: Which of the following data sets or plots could have a regression line with a negative y-intercept? Select all that apply.
- Question: True or False: The more time it takes to travel a road, the longer the road is.
- Question: A large observational study asks participants about caffeine consumption and sleep duration. The study finds that people with the largest caffeine intake have the shortest sleep duration.
Identify the relation between caffeine consumption and sleep duration.
| Instituition / Term | |
| Term | Fall 2020 |
| Institution | MATH 225N Statistical Reasoning for the Health Sciences |
| Contributor | Gbenga |
