1. If data do not follow a linear trend, correlation

Represents whatever trend is present

Will only measure the linear trend

2. The type of regression we use tries to

Tie data together by connecting the dots

Find the line that best fits the data

Find the polynomial that best fits the data

Construct as many lines as there are data points

3. To use a correlation test, data types need to be

Both continuous

Both discrete

Both qualitative

One qualitative, one continuous

5. We find a correlation between age and white blood cell count to be 0.89. This means that age causes higher white blood cell counts.

True

False

6. What display allows us to assess if regression can be used?

Scatterplot

Pie chart

Histogram

Contingency table

8. When using correlation, we no longer care about having a random sample

True

False

9. In regression, what we're trying to predict is the

Independent variable

Treatment

Dependent variable

Explanatory variable