Statistics Review

Estimate the correlation coefficient for this scatterplot.

• A) r = -0.9

• B) r = 1

• C) r = 0.9

• D) r = -1

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

Which of the following statements is true?

• The correlation coefficient and the slope of the regression line may have opposite signs.

• A correlation of 1 indicates a strong relationship between the variables.

• Correlations of +0.87 and -0.87 indicate the same degree of clustering around the regression line.

• A correlation of 0 shows little or no association between two variables.

Tags

CCSS.HSF.LE.B.5

Is r = -0.87 strong, moderate, or weak?

• strong

• moderate

• weak

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

A study compared the number of years of education and a person's annual salary. The correlation coefficient of the data was r = 0.913. Which conclusion can be made using the correlation coefficient?

• There is a strong positive correlation.

• There is a strong negative correlation.

• There is no correlation.

• There is a weak positive correlation.

Tags

CCSS.HSS.ID.C.8

What COULD be the approximate value of the correlation coefficient for the scatter plot?

• -.851

• -.162

• 0.211

• 0.905

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

Which value of r represents data with a strong negative correlation between two data sets?

• -1.07

• -0.89

• -0.14

• 0.92

Tags

CCSS.HSF-LE.A.1B

Which graph represents data that has a correlation coefficient close to -1?

• 
• 
• 
• 

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

Which interval shows the greatest number of pets?

• 15-19
• 0-4
• 5-9
• 10-14

Tags

CCSS.HSN.VM.C.6

How many students were greater than or equal to 60 inches tall?

• 21
• 11
• 17
• 6

Tags

CCSS.HSN.VM.C.6

How many people watched more than 25 hours of TV last week?

• 0
• 10
• 38
• 42

Tags

CCSS.5.G.A.2