Statistical Analysis Q4 Review

Estimate the correlation coefficient for this scatterplot.

• A) r = 1.2

• B) r = 0.89

• C)r = 0

• D) r = -0.89

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

What type of correlation exists between the outside temperature and the amount of layers you wear.

• A) Positive correlation

• B) Negative correlation

• D) No correlation

What is the best definition of the least squares regression line?

• The line that minimizes the squares of the horizontal distances between the data points and the line.
• The line that minimizes the squares of the vertical distances between the data points and the line.
• The line that minimizes the vertical distances between the data points and the line.
• The line that passes through the most number of data points.

Tags

CCSS.HSS.ID.C.7

The residual plots from five different least squares regression lines are shown below. Which of the plots shows the strongest evidence that its regression line is an appropriate model for the data and is consistent with the assumptions required for inference for regression?

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Tags

CCSS.HSS.ID.A.3

True or False: The residual value can be calculated by subtracting: "predicted y - actual y"

• True

• False

If Joe worked 30 hours, how much is he expected to earn?

• $600
• $200
• $1000
• $800

Tags

CCSS.HSF.IF.A.2

The correlation coefficient r is a value between

• 0 and 1
• 0 and 100
• -1 and 1
• -2 and 2

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

Determine the least squares regression line.

• y = -0.517x + 9.143
• y = -0.514x + 9.314
• y = -0.56x + 9.54
• y = -0.534 + 9.59

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

• strong

• moderate

• weak

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

What should a residual plot look like if the data is linear?

• Distinct Pattern

• Curve

• Random