correlations

Question 1

what is the range of values for correlation coefficients

Answer 1

-1.0 to 1.0

Question 2

what are illusory correlations?

Answer 2

correlations that are percieved to exist but do not

Question 3

what do correlational research studies explain

Answer 3

the strength of the relationship between 2 variables

Question 4

how do correlation coefficients measure the strength of a relationship between 2 variables?

Answer 4

by measuring the extent to which two variables relate

Question 5

how can regression torward the mean lead to misconceptions and ineffective practices?

Answer 5

by causing people to misunderstand cause and effect

Question 6

what is the concept of correlation?

Answer 6

a measure of how closely two things vary together

Question 7

what is regression torward the mean?

Answer 7

the tendency for avg results to be followed by more avg results

Question 8

what is the difference between positive and negative correlations?

Answer 8

positive correlations indicate a direct relationship, while negative correlations indicate an inverse relationship

Question 9

the correlation between 2 measures obtained on a group of individuals is graphically represented as a..

Answer 9

scatterplot

Question 10

which of the following correlations coefficents most likely represents the relationship between length of sleep deprivation and level of alertness?

Answer 10

.85

Question 11

researchers find that there is a significant, positive correlation between the number of hours students sleep and their grades. the researchers would be justified in concluding that..

Answer 11

students who earn good grades tend to sleep more than those who do not

Question 12

researchers have found a negative correlation between income and dental problems. what conclusion can correctly be drawn from this statement?

Answer 12

as income increases, the likelihood of dental problems decreases