A psychologists wants to study the effect of sugar on running speed.  He recruits subjects by posting a sign-up on Facebook for anyone willing to participate.  The psychologist is conducting

Making a scatter diagram before figuring the correlation coefficient is a good idea because

Which of the following is an example of a rank-order variable?

A researcher was interested in the relationship between the number of hours spent looking at cat memes on the internet and depression. She sampled 100 people and conducted a bivariate correlation on their responses. Her results indicated that people who spent more time looking at cat memes online had lower levels of depression. In other words, the researcher found a(n) _____ correlation.

Mike was curious as to whether or not people share his opinions about smoking on college compuses.  He designed a survey on the issue and gave it out to his friends and family. When he interpreted his results he was pleased to see that everyone’s opinions matched his own. Mike’s interpretation of his findings best illustrates

Making a scatter diagram before figuring the correlation coefficient is a good idea because

Dr. Statistics wants to know what study methods her students find most useful in preparing for her exams so she conducts interviews with 50 of her 100 students.  In this example the  population is

Which of the following is an example of a rank-order variable?

Mike was curious as to whether or not people share his opinions about smoking on college compuses.  He designed a survey on the issue and gave it out to his friends and family. When he interpreted his results he was pleased to see that everyone’s opinions matched his own. Mike’s interpretation of his findings best illustrates

Which of the following represents a positive correlation?