Correlation, Causation, Both, Neither

Which of the following situations is an example of causation?

• A only

• B only

• Both A and B

• Neither A nor B

The table shows the number of items several shoppers purchased and the amount of time it took them to check out. Find the correlation coefficient to the nearest hundredth.

*NOTE: input your answer as a NUMBER only :)

The table shows the number of items several shoppers purchased and the amount of time it took them to check out. Describe the association.

• strong positive correlation

• strong negative correlation

• weak positive correlation

• weak negative correlation

Which of the following best describes the correlation for the data shown? Be sure to check ALL that apply. :)

• Positive

• Negative

• None

• Weak

• Strong

Zoe and Lyla are each given a scatter plot. Zoe's has a correlation coefficient of -0.25 while Lyla's has a correlation coefficient of -0.75. Which of the following must be true?

• Lyla's graph has a steeper slope than Zoe's.

• The points on Lyla's graph are more spread out than the points on Zoe's graph.

• Zoe's graph contains more data points than Lyla's.

• The data points on Zoe and Lyla's graphs both decrease from left to right.

The graph shows the years of experience of a little league player compared to the number of hits he had in a season. Based on the trend in the data, if a player had 50 hits, how many years of experience would you expect them to have?

*NOTE: input your answer as a WHOLE NUMBER only :)

Based on the scatter plot, what determination can be made.

• As the number of free throws increases so does the total number of points.

• As the number of free throws increases, the total number of points decreases.

• There is no correlation.

• As the number of free throws increases, there is no change in the total points scored.

A study of 100 randomly selected students from first through sixth grade shows a strong correlation between height and reading ability. Based on this, can you conclude that being taller causes students to be a better reader?

• Yes, because taller students are smarter.

• No, because students grow and learn at the same time, but there is an upper limit.

• Yes, because reading more makes you grow.

• No, because actually shorter students are smarter.

Determine if there is correlation and causation:

A study found no noticeable relationship between the number of hours students spend online and student grades.

• Correlation and causation

• Correlation but no causation

• Neither

Which equation serves as the best line of fit?

• y = 0.6x + 1

• y = 0.5x + 2

• y = x - 2

• y = .075x