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Worksheetscorrelation and regression
Total questions: 11
Worksheet time: 39mins
Describe the correlation in the graph shown.
A) Strong Negative
B) Strong Positive
C) Weak Negative
D) No Correlation
Estimate the correlation coefficient for this scatterplot.
A) r = 1.2
B) r = 0.89
C)r = 0
D) r = -0.89
Estimate the correlation coefficient for this scatterplot.
A) r = -0.9
B) r = 1
C) r = 0.9
D) r = -1
Describe the relationship between the variables.
A) Weak negative correlation
B) Moderate negative correlation
C) Moderate positive correlation
D) Strong negative correlation
As x increases, y decreases.
A) no correlation
B) negative correlation
C) correlation coefficient
D) positive correlation
As x increases, y increases
A) correlation coefficient
B) causation
C) positive correlation
D) negative correlation
What type of correlation (association)?
Ice cream sales and shark attacks.
A) Positive correlation
B) Negative correlation
D) No correlation
The table shown is comparing a person's foot length to their height in cm. Calculate a line of best fit.
y = 25.05 + 5.57x
y = 5.57 + 25.05x
y = -5.57 + 25.05x
y = 5.57 - 25.05x
The chart below tracts starting salaries for health care workers since the year 2000. Using linear regression, find the equation of best fit. Round decimals to 3 places.
y = 27541.812 + 839.721x
y = - 839.721 + 27541.812x
y = 839.721 + 27541.812x
y =- 27541.812 + 839.721x
