Unit 4A Review

What is the formula for the regression line?

• y=mx+b

• y=a+bx

What should a residual plot look like?

• Distinct Pattern

• Curve

• Random with no pattern

• A few clumps

Shown is a residual plot. Would a linear regression model of the data be most appropriate?

• YES

• NO

Estimate the correlation coefficient.

• r = -0.8

• r = -0.5

• r = 0.5

• r = 0.8

Shown is a residual plot. Would a linear regression model of the data be most appropriate?

• YES
• NO

What type of correlation?

• Positive Correlation

• Negative Correlation

• No Correlation

What type of association does this graph have?

• positive 
• negative
• none
• all of the above

What should a residual plot look like?

• Distinct Pattern
• Curve
• Random with no pattern
• A few clumps

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.

Tags

CCSS.HSF.LE.B.5

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

• A) The more books students read, the lower their English grade.

• B) The more books students read, the higher their English grade.

• C) The fewer books students read, the higher their English grade.

• D) No relationship exists between the number of books students read and their English grades.

Tags

CCSS.RI.11-12.7

CCSS.RI.9-10.7

CCSS.RL.11-12.7

CCSS.RL.8.7

CCSS.RL.9-10.7