Correlation Coefficient, r

Determine the line of best fit for the data shown.

If the correlation coefficient, r, of a data set is r = 0. 32. What type of correlation does the data have?

• Strong Positive

• Strong negative

• Weak Postive

• Weak Negative

• No correlation

The table gives the number of hours spent studying for an algebra exam (x) and the final exam (y). Determine the correlation of the data.

• Weak positive

• Weak Negative

• Strong Positive

• Strong Negative

If the correlation coefficient, r, of a data set is r = -0.95. What type of correlation does the data have?

• Strong Positive

• Strong negative

• Weak Postive

• Weak Negative

• No correlation

Data is analyzed comparing hours studied and grades. It is determined that the correlation coefficient is 0.92. This means there is a

(a)   between studying and grades.

• strong positive correlation
• strong negative correlation
• weak positive correlation
• weak negative correlation

r = -0.3 is considered to have...

• moderate negative correlation

• weak negative correlation

• no correlation

• strong negative correlation

The correlation coefficient is a number "r" such that: 

• -1<r<1
• -1>r>1
• -1≤r≤1
• -1≥r≤1

What type of association does this graph have?

• positive 
• negative
• none
• all of the above

Describe a correlation with a coefficient of r=-0.89

• Strong positive

• Weak positive

• Strong negative

• Weak negative

A perfect negative correlation has a correlation coefficient of ____. 

• 1
• -1
• 0