quiz 10

Question 1

We use the ______ with ordinal data rather than continuous data.

Answer 1

Spearman’s rho

Question 2

The scatterplot shows that for a positive relation, as one score increases, the other does what?

Answer 2

It increases.

Question 3

Which of the following is an effect an outlier can have on a correlation?

Answer 3

It can change the significance (make a significant correlation non-significant or vice versa)

It can change the direction of the relationship (make a negative relation positive or vice versa)

It can change the magnitude (make it stronger or weaker)

Question 4

Which statistic is used as a calculation of effect size for the correlation?

Answer 4

r – It can serve as its own effect size.

Question 5

Correlation can only prove causation if the effect size is greater than 0.75.

Answer 5

False

Question 6

The idea that as one score changes another changes in a predictable way is called ______.

Answer 6

Covariance

Question 7

Correlation matrices are a great way of presenting many results quickly and can also show variable means and standard deviations, as well as asterisks showing whether a correlation is significant or not.

Answer 7

True

Question 8

Correlations are visualized on a ______.

Answer 8

Scatter plot

Question 9

Which of the following best describes the purpose of the correlation test?

Answer 9

Examine the degree to which two continuous variables are related to one another.

Question 10

A correlation of +1.25 shows a very strong relationship between variables.

Answer 10

False