correlation and causation, algebra homework help
correlation and causation, algebra homework help
4. How could the relationship of the data be classified?
A fairly strong positive correlation
A fairly weak positive correlation
A fairly strong negative correlation
A fairly weak negative correlation
6. You suspect that the spiciness of food served in a restaurant is positively correlated with number of soft drinks ordered. You have gathered several observations of people ordering food of different spice-levels and the number of soft drinks they ordered. What would be your next steps to test your hypothesis?
a Plot all data together on a dot plot to assess if there is any visible correlation between the data sets
b Offer a conclusion based on the data you observed.
c Pick two points on the dot plot and find a line of best fit.
d Find the correlation coefficient to see how well the line of best fit actually fits the data.
7. 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?
| a | Yes; students who play violin must necessarily get better grades |
| b | Yes; the correlation coefficient is above 0.5, so that implies causation |
c No; playing violin and earning better grades are completely unrelated
d
|
8. 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 |
