Identifying Correlation

Using a trend line, if I have a goldfish population of 30, how many star fish will there be?

• 10

• 5

• 12

• 7

Is the relationship in the table linear?

• No, because there's not a constant rate of change.

• None of these are correct.

What type of correlation does the following scatterplot represent?

• Positive

• Negative

• No correlation

• Both types of correlations

How do outliers affect the calculation of correlation coefficients in a dataset?

• Outliers do not affect correlation coefficients

• Outliers can artificially increase the strength of a correlation

• Outliers can artificially decrease the strength of a correlation

• Outliers can either increase or decrease the strength of a correlation, depending on their position

Answer explanation

Outliers can either increase or decrease the correlation strength, depending on their position.

What type of correlation does this graph have?

• positive

• negative

• none

• all of the above

Which sentence describes the relationship shown on this scatter plot?

• As the temperature decreases, the visitors increase.

• As the temperature increases, the number of visitors increases.

• As the visitors increase, the temperature decreases.

• No correlation

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

A connection between two or more things

• Correlation

• Linear

• Trend Line

• Scatter Plot

When the data closely resembles a line

• Strong Correlation

• Weak Correlation

• No Correlation

• Correlation

The measure of the strength and direction of a linear relationship

• Interpolation

• Extrapolation

• Correlations Coefficient

• Residual