Quiz: Chapter 4 Review Quiz This Question: 1 pt 2.1 3.9 28 3.6 O A ??. O c. O D.

Question

Quiz: Chapter 4 Review Quiz This Question: 1 pt 2.1 3.9 28 3.6 O A ??. O c. O D. O A. O D. 121 Compute the linear correlation coefficient with the additional data point. The linear correlation coefficient for the five pieces of data is (Round to three decimal places as needed.) Comment on the effect the additional data point has on the linear correlation coefficient. O B. C. The additional data point weakens the appearence of a linear association between the data points The additional data point does not affect the linear correlation coefficient. causation. The scatter diagram can be used to distinguish The scatter diagram is needed to see if the correlation coefficient is being affected by the presence of outliers. The scatter diagram is needed to determine if the correlation is positive or negative. association A. B. O C.

Explanation / Answer

a) option B is correct

b)

option C is correct

comment on effect: option A

explain why correlations: option B

S.No X Y (x-x?)2 (y-y?)2 (x-x?)(y-y?) 1 2.100 3.900 1.6900 0.2500 -0.6500 2 4.000 1.300 0.3600 4.4100 -1.2600 3 2.800 3.600 0.3600 0.0400 -0.1200 4 4.700 4.800 1.6900 1.9600 1.8200 Total 13.6 13.6 4.1000 6.6600 -0.2100 Mean 3.4000 3.4000 SSX SSY SXY

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