Posted by **Beverly** on Tuesday, February 14, 2012 at 12:39am.

What does your scatter diagram look like? Briefly describe it.

Based on your prediction about the relationship between the amount of coffee people drink and the number of hours they sleep, what is your H0 and what is your HA ?

Did you find a positive linear relationship or a negative linear relationship? How do you know?

• If you were pursuing this study, what calculations would you perform to describe this relationship and why?

• Without completing the calculations, assume that you obtained a significant result. What would you conclude about the relationship between coffee and sleep?

Did you find a positive linear relationship or a negative linear relationship? How do you know?

If you were pursuing this study, what calculations would you perform to describe this relationship and why?

Without completing the calculations, assume that you obtained a significant result. What would you conclude about the relationship between coffee and sleep?

- statistics/correlation relations -
**PsyDAG**, Tuesday, February 14, 2012 at 12:57pm
We have no access to your scatter diagram.

- statistics/correlation relations -
**nancyjean**, Saturday, September 8, 2012 at 4:45pm
25

Marks: 1.00

The value of a correlation is reported by a researcher to be r = -0.5. Which of the following statements is correct?

Choose one answer. a. The x-variable explains 50% of the variability in the y-variable.

b. The x-variable explains -50% of the variability in the y-variable.

c. The x-variable explains 25% of the variability in the y-variable

d. The x-variable explains -25% of the variability in the y-variable

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