# Question: For each of the following indicate whether it is a

For each of the following, indicate whether it is a positive linear, negative linear, or nonlinear relationship:

(a) Quality of performance (Y) increases with increased arousal (X) up to an optimal level; then quality of performance decreases with increased arousal.

(b) Overweight people (X) are less healthy (Y).

(c) As number of minutes of exercise increases each week (X), dieting individuals lose more pounds (Y).

(d) The number of bears in an area (Y) decreases as the area becomes increasingly populated by humans (X).

(a) Quality of performance (Y) increases with increased arousal (X) up to an optimal level; then quality of performance decreases with increased arousal.

(b) Overweight people (X) are less healthy (Y).

(c) As number of minutes of exercise increases each week (X), dieting individuals lose more pounds (Y).

(d) The number of bears in an area (Y) decreases as the area becomes increasingly populated by humans (X).

**View Solution:**## Answer to relevant Questions

Poindexter sees the data in question 12d and concludes, “We should stop people from moving into bear country so that we can preserve our bear population.” What is the problem with Poindexter’s conclusion? (a) You have collected data that you think show a relationship. What do you do next? (b) What is the advantage of computing a correlation coefficient? (c) What two characteristics of a linear relationship are described by a ...Why can’t you obtain a correlation coefficient greater than ±1? Poindexter finds r = -.80 when correlating number of hours studied and number of errors made on a statistics test. He also finds r = + .40 between speed of taking the test and number of errors on the test. He concludes that ...In the typical experiment, (a) Do we group the scores to summarize them, and if so how? (b) What are the two descriptive statistics we compute for the summary?Post your question