a. Which of the following scatter diagrams accurately represents the data set?

#1	Russell 1000 DJIA	#2	Russell 1000 DJIA
#3	Russell 1000 DJIA	#4	Russell 1000 DJIA

Scatter diagram #1Scatter diagram #2Scatter diagram #3Scatter diagram #4

b. Compute the sample mean and standard deviation for each index (to 2 decimals).

	sample mean	standard deviation
DJIA:
Russell 1000:

c. Compute the sample correlation coefficient for these data (to 3 decimals).

d. Discuss similarities and differences in these two indexes.

There is a strong positive linear association between DJIA and Russell 1000There is a moderate positive linear association between DJIA and Russell 1000There is neither a positive nor a negative linear association between DJIA and Russell 1000There is a moderate negative linear association between DJIA and Russell 1000There is a strong negative linear association between DJIA and Russell 1000

The variance of the Russell 1000 is slightly

largersmaller

than that of the DJIA.

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