Question

1. Given the data set for the length of time a person has been jogging and the person's speed, hypothesize a relationship between the variables.
I would expect the data to be positively correlated.
I would expect the data to be negatively correlated.
I would expect no correlation.
There is not enough information to determine correlation.



2. Analyze the following statement:

Brandon puts his water in the refrigerator so it will stay cold.

Is the statement an example of correlation or causation?

Correlation, because there aren't enough observable trials
Causation, because a refrigerator keeps things cold
No relationship, because water temperature is independent of whether or not it is in a refrigerator
There is not enough information to make a conclusion




3. The correlation coefficient for practicing violin and getting better grades in a group of people is 0.8. Analyze the following statement:


Playing violin causes students to get better grades.

Is this a reasonable conclusion?

Yes; students who play violin must necessarily get better grades
Yes; the correlation coefficient is above 0.5, so that implies causation
No; playing violin and earning better grades are completely unrelated
No; even though there is a strong positive correlation, playing violin doesn't cause students to get better grades

Answer 1

Answer:

Step-by-step explanation:

One

This is one of those exercises that the answer is ultimately "It depends." If we are talking about a trained athlete or just me running around the block. A trained athlete would carefully pace himself to have enough energy to finish. If he is not well trained, the correlation is negative. Even well trained athletes with increased time will have decreased speed. I'd say it is negative.

Two

It is causation. It is what fridges do.

Three

Another guess. It depends. People who play musical instruments do get better grades, especially if they do it well. It takes a great deal of discipline and concentration to play either the piano or violin. Correlation and causation are what is unrelated. I guess the answer is D