« previous next »

Author Question: The coefficient of correlation between variables y and x is 0.80 . Calculate and interpret the value ... (Read 70 times)

Arii_bell

  • Hero Member
  • *****
  • Posts: 596
on: Jun 24, 2018
The coefficient of correlation between variables y and x is 0.80 . Calculate and interpret the value of the coefficient of determination.

Question 2

For a given value of x, which will be wider, a 90 confidence interval or a 90 prediction interval? Explain


uniquea123

  • Sr. Member
  • ****
  • Posts: 311
Reply #1 on: Jun 24, 2018
Answer to Question 1

The coefficient of determination is 0.64 (or the coefficient of correlation squared). This means that 64 of the variation in y and is explained by x.

Answer to Question 2

For a given value of s, the prediction interval will always be wider than the confidence interval. The confidence interval is concerned with the mean value of y only; the prediction interval is concerned with all of the possible values of y.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Did you know?

Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

Sequential blending uses a computer to calculate the correct ratio as well as the prescribed order ... Sequential blending uses a computer to calculate the correct ratio as well as the prescribed order ...
How to calculate present value using the compound interest formula (Question 1) How to calculate present value using the compound interest formula (Question 1)
How to calculate fuel costs How to calculate fuel costs
How to calculate the gain and loss gene numbers with low bootstrap of phylogenetic tree? How to calculate the gain and loss gene numbers with low bootstrap of phylogenetic tree?
Calculate ∆G° Calculate ∆G°
Calculate the accumulated value of monthly payments of $100.00 made at the end of each month ... Calculate the accumulated value of monthly payments of $100.00 made at the end of each month ...
Video: Types of disease resistance: innate defenses & immunity

For a complete list of videos, visit our video library