Measures of Regression and Prediction Intervals (9.3)

Scatterplots show trends in data.

• True
• False

Tags

CCSS.HSF.IF.B.4

The x-values of a function can also be called...

• the dependent values

• the algebra numbers

• the domain

• the range

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

The range of a function is ______________________

• the domain
• the x-values
• the maximum minus the minimum
• the y-values

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

What kind of trend is shown from this scatter plot?

• positive correlation
• negative correlation
• none
• cannot be determind

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters
• 15 chapters
• 18 chapters
• 21 chapters

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

What should a residual plot look like?

• "U" Shaped
• Upside down "U"
• Random
• Circle 

Tags

CCSS.HSS.ID.B.6

How do you calculate a residual?

• Observed - Predicted
• Predicted - Observed
• find r²  in your TI-84
• find r in your Ti-84

The equation of the best-fit line is
y(hat) = 1.3 + 0.73x.  What is the residual for the point (4, 7)?

• 2.78
• 3.00
• 4.00
• 4.22

Tags

CCSS.8.EE.C.8C

Which is TRUE?
I.  Random scatter in the residual plot indicates a linear model.
II.  If two variables are very strongly associated, then the correlation between them will be near 1 or -1.
III.  Small residual values (close to 0) indicate possible outliers.

• I only
• II only
• I and II only
• I, II and III

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

CCSS.HSS.ID.C.9

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

• YES
• NO