What is the correlation coefficient r and what does it mean in this case? What is the coefficient of determination and what does it mean in this case? | Browse Homework Help
Week Four, Discussion One
Q1 Correlation between coffee and cholesterol
A study from a Colombian research center is about to publish a pilot study regarding a new coffee plant that they believe can reduce total cholesterol in humans. They gave increasing doses (cups of coffee) to a test patient over several weeks and recorded the following data:
Don't use plagiarized sources. Get Your Custom Essay on
What is the correlation coefficient r and what does it mean in this case? What is the coefficient of determination and what does it mean in this case? | Browse Homework Help
Get an essay WRITTEN FOR YOU, Plagiarism free, and by an EXPERT! To Get a 10% Discount Use Coupon Code FIRST39420
| caffeine (mg) | Cholesterol level (mg/dL) |
| 100 | 684 |
| 200 | 547 |
| 300 | 200 |
| 400 | 399 |
| 500 | 415 |
| 600 | 400 |
| 700 | 58 |
Evaluate the claim that the caffeine from this new plant reduces cholesterol by plotting caffeine levels (x) versus the cholesterol levels (y).
- What is the correlation coefficient r and what does it mean in this case?
- What is the coefficient of determination and what does it mean in this case?
- Is there a statistically significant correlation between caffeine intake and cholesterol levels in this case?
Week Four, Discussion Two
Q2 Regression- What is the predicted cholesterol level?
Given the data presented in Discussion Question 1 for this week, determine the cholesterol level of someone who drank two and a half cups of coffee a day. To get the answer, plot a regression line in StatCrunch and post your answers from StatCrunch for the following:
- a) What is the intercept? (or what would be your cholesterol level while ingesting no caffeine?)
b) What is the slope? (or, what is what we callbin the linear regression equation?)
c) What is the cholesterol level of someone who drank two and a half cups of coffee a day (given that 1 cup of coffee equals 100 mg of caffeine)?
Calculator
Our features
We've got everything to become your favourite writing service
Money back guarantee
Your money is safe. Even if we fail to satisfy your expectations on your paper, our money back guarantee allows you to request a refund.
Confidentiality
We don’t our clients private information with anyone. What happens on our website remains confidential.
Our service is legit
We always keep our word and follow every instruction on order, and this kind of academic assistance is perfectly legitimate.
Get a plagiarism-free paper
We check every paper for plagiarism before submission, so you get a unique paper written for your particular purposes.
We can help with urgent tasks
Need a paper tomorrow? We can write it even while you’re sleeping. Place an order now and get your paper in 4 hours.
Pay a fair price
Our prices depend on urgency of your paper. If you want a cheap essay, place your order in advance. Our prices start from $11 per page.