Question

A correlation of -0.75 between number of hours worked per week and stress tells you that as hours of work decreases stress also decrease. Question 1 options: True False Save Question 2 (1 point) If we measure the amount of rainfall in a particular season and the rate of growth of the grass in a particular area and find a positive correlation of 0.83, we can say with some certainty that rain causes grass to grow. Question 2 options: True False Save Question 3 (1 point) Knowing the strength of a relationship between two variables, such as GPA and Success in Graduate School, allows the prediction of one variable (say success) based on the level of the other (GPA). Question 3 options: True False

Answer 1

Answer:

1. The correct answer is False.

A negative correlation means when one variable increases, other variable decreases. If hours of work decreases stress will increase.

2. The correct answer is True.

A positive correlation means if one variable increases, another variable will also increase. A positive correlation of 0.83 is a strong positive correlation which means as the number of rainfall increases, grass will grow more.

3. The correct answer is True.

If we know the strength of the correlation, we can easily predict the correlation between variables.