AP Statistics Two Variable Data Review

Describe the correlation in the graph shown.

• Strong Negative
• Strong Positive
• Weak Negative
• Weak Positive

Describe the correlation in the graph shown.

• Weak Negative
• Weak Positive
• Strong Negative
• Strong Positive

A correlation shows that two variables are

• related
• causing each other
• corred
• ambiguous

What type of correlation does this graph show?

• Positive
• negative
• none
• all of the above

What type of correlation describes the following sentence:
The "number of people that go to the pool" and the "temperature outside".

• positive
• negative
• no correlation

What type of correlation describes the following sentence:
The "temperature outside" and the "number of hot chocolate sold" at a football game.

• postive
• negative 
• no correlation

If two variables are negatively correlated...

• they always are mean to each other 
• high values for one variable are associated with high values of the other variable
• high values for one variable are associated with low values of the other variable
• the data sets are completely unpredictable

What is the slope of the LSRL from this printout?

• 0.74
• -0.47
• 1.098
• 23.59

The table shown is comparing a person's foot length to their height in cm. Calculate the regression equation

• yhat = 25.05x + 5.57
• yhat = 5.57x + 25.05
• yhat = -5.57x + 25.05
• yhat = 5.57x - 25.05

Which is the best CONTEXTUAL description of the y - intercept for the linear regression equation of the rats: Weight = 100 + 40(Time)?

• The y-intercept is 100, which means the rat is predicted to weigh 100 grams at birth. 
• The y-intercept is 100, which is where the graph crosses the y-axis. 
• 100 is where the data starts on the y-axis. 
• The y-intercept is 100, which means at a weight of 0, the rat will take 100 seconds.