CCA Chapter 6 Review

Which choice best describes the direction of the association?

• Positive

• Negative

• Neither

Tags

CCSS.HSS.ID.B.5

Which choice best describes the form of the association?

• Exponential

• Linear

• Quadratic

• None of these

Tags

CCSS.8.F.A.3

Which choice best describes the strength of the association?

• Strong

• Weak

• No Association

Tags

CCSS.HSS.ID.B.5

Does this graph show any outliers? If so, which point is an outlier?

• Yes, (1.5, 76)

• Yes, (6.7, 98)

• No, there are no outliers

Tags

CCSS.8.SP.A.1

Create a scatterplot on your calculator using this data. Do not delete the data from your calculator yet!

What is the slope, m, for the Least Squares Regression Line?

• 0.776

• 0.948

• 1.53

• 2.14

Tags

CCSS.8.EE.B.5

This is the same data from the last question!

What is the y-intercept for the Least Squares Regression Line?

• 0.776

• 0.948

• 1.53

• 2.14

Tags

CCSS.8.EE.C.8C

The equation for the Least Squares Regression Line in the given graph is: 

 $s=30t-188$  

where s is the sales in dollars and t is the temperature in degrees Celcius.

Describe the slope of the Least Squares Regression Line in the context of the graph.

• For every degree of increase, the sales increase by $30.

• For every 30 degrees of increase, the sales increase by $1.

• For every degree of increase, the sales decrease by $188.

• For every 188 degrees of increase, the sales decrease by $1.

Tags

CCSS.HSF.LE.B.5

The equation for the Least Squares Regression Line in the given graph is: 

 $s=30t-188$  

where s is the sales in dollars and t is the temperature in degrees Celcius.

Predict the amount of sales (in dollars) when the temperature is 21 degrees Celcius.

• 188

• 220

• 442

• 630

• 2.4

• 1.3

• -2.4

• -1.3

Tags

CCSS.8.SP.A.3

Estimate the correlation coefficient for the graph.

• $r=-0.8$

• $r=-0.2$

• $r=0.2$

• $r=0.8$

Tags

CCSS.HSS.ID.C.8