Statistics

Statistics

Chapter 3 Quiz

1. According to the following linear relationship, what happens to when increases?

a. Decreases b. Increases c. does not change d. None of the above

2. According to the above graph, which axis represents the independent variable? a. b. c. and d. There is not enough information to determine the variable

3. Given the following regression equation, which is true? = 2 + 3 a. The correlation between and is positive b. The value of is 2 more than that of

c. The value of decreases 3 units per every 1 unit increase in d. The correlation between and is negative

4. The symbol Σ stands for a. Division b. Function c. Variable d. Sum 5. The regression equation is: a. = + b. = + c. = + d. = −

Answer key is found on page 81.

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