4. correlation

Question 1

bivariate data def

Answer 1

data that has pairs of value for two variables

Question 2

which variable is put on the x or y axis

Answer 2

independent on x
dependent on y

Question 3

what does correlation describe

Answer 3

the nature of the linear relationship between 2 variables

Question 4

negative correlated variables

Answer 4

one variable decreases the other decreases

Question 5

positive correlated variables

Answer 5

one variable increases the other increases

Question 6

in y = a + bx
coefficient b tells you

Answer 6

the change in y for each change in x ,, gradient

Question 7

in y = a + bx
if coefficient is positive
if coefficient is negative

Answer 7

data positively correlated
data is negatively correlated

Question 8

the regression of a Line of y is written as

Answer 8

y = a + bx

Question 9

what is the use of regression line

Answer 9

make predictions for the values of the dependent variables that are within the range given

Question 10

interpolating

Answer 10

estimating a value inside the data range is

Question 11

extrapolating

Answer 11

estimating a value outside the data range