Which of the following is NOT a property of the linear correlation coefficient r

Question

Which of the following is NOT a property of the linear correlation coefficient r? a. The value of r is always between-1 and 1, inclusive. b. The value of r measures the strength of a linear relationship. c The linear correlation coefficient is robust. That is, a single outlier will not affect the value of r. d. The value of r is not affected if the independent and dependent variables are interchanged. ABC High School needs to randomly select 200 from a list of students for a state exam in order to continue to receive state funding. This is an example of: a. Simple random sampling b. Stratified sampling c. Cluster sampling d. Systematic sampling

Explanation / Answer

Q.4 a. OPtion a is correct. as range of r is -1 to 1, both inclusive.

b. Option b is also correct. r entials the strength of lienad relationship.

c. A single outlier will affect the linear correlation coefficient. So, it is not robust anymore. So, option c is wrong.

d. Option d is also right as it can be interchanged.

Q.5 It is an example of samile random sampling . Option a is correct. As it not a cluster, not any stratificantion or not any system too.

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