Question

which statement about the outlier in the data set is true?
blake should not include the outlier because it overstates the effect of rainfall on temperature.
blake should include the outlier because it shows there is no relationship between rainfall and average daily
temperature.
blake should not include the outlier because it understates the effect of rainfall on temperature.
blake should include the outlier because it shows there is a relationship between rainfall and temperature.

Explanation:

Step1: Analyze the outlier's impact

Looking at the scatter - plot, the general trend is that as rainfall increases, the average daily temperature decreases. The outlier (the point with relatively low rainfall and high temperature) overstates the temperature for its rainfall amount.

Step2: Consider inclusion criteria

Outliers that deviate from the overall trend (in a way that misrepresents the relationship) should be excluded. Since this outlier overstates the effect of rainfall (makes it seem like for a certain low - rainfall amount, the temperature is higher than the general trend), it should not be included.

Answer:

Blake should not include the outlier because it overstates the effect of rainfall on temperature.