Suppose there is a correlation of +0.87 between the length of time a person is in prison and the amount of aggression the person displays on a psychological inventory. this means that spending longer amount of time in prison causes people to become more aggressive is the answer true or false?

True

Step-by-step explanation:

A correlation coefficient is a measure of linear association between two variables.   If two variables are independent of each other correlation coefficient would be 0.

Normally, correlation coefficient denoted by r can be either positive or negative

Its value always lie between -1 and 1.  

Here we are given that there is a correlation of +0.87 between the length of time a person is in prison and the amount of aggression the person displays on a psychological inventory. this means that spending

Since r is positive and also near to 1, we can say there is a strong positive correlation between the  length of time a person is in prison and the amount of aggression the person displays on a psychological inventory.

i.e. increase in one variable causes increase in the other

Hence the given statement is true.

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x