math-221 questions

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22.       Which of the following describes a random sample?

 

            a. every nth individual

 

            b. anybody who signs up

 

            c. equally likely chance

 

            d. choosing only girls or only boys

 

 

 

23.       Interpret an r value of -0.94.

 

            a. strong negative correlation

 

            b. strong positive correlation

 

            c. weak positive correlation

 

            d. no correlation

 

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