2018 Final Math Units Test (All Units) on April 26, 2018

Question 1

What is Pearson correlation coefficient of perfect positive correlation?

Answer 1

r = 1

Question 2

What is the Pearson correlation coefficient of very strong positive correlation?

Answer 2

0.95 ≤ r < 1

Question 3

What is the Pearson correlation coefficient of a strong positive correlation?

Answer 3

0.87 ≤ r < 0.95

Question 4

What is the Pearson correlation coefficient of a moderate positive correlation?

Answer 4

0.5 ≤ r < 0.87

Question 5

What is the Pearson correlation coefficient of a weak positive correlation?

Answer 5

0.1 ≤ r < 0.5

Question 6

What is the Pearson correlation coefficient of a no correlation positive correlation?

Answer 6

0 ≤ r < 0.1

Question 7

What is Pearson correlation coefficient of perfect negative correlation?

Answer 7

r = -1

Question 8

What is the Pearson correlation coefficient of very strong negative correlation?

Answer 8

-1 ≤ r ≤ -0.95

Question 9

What is the Pearson correlation coefficient of a strong negative correlation?

Answer 9

-0.95 < r ≤ -0.87

Question 10

What is the Pearson correlation coefficient of a moderate negative correlation?

Answer 10

-0.87 < r ≤ -0.5

Question 11

What is the Pearson correlation coefficient of a weak negative correlation?

Answer 11

-0.5 < r ≤ -0.1

Question 12

What is the Pearson correlation coefficient of a no correlation negative correlation?

Answer 12

-0.1 < r ≤ 0

Question 14

what is a unit vector?

Answer 14

any vector that has a length of one unit

Question 15

What is the formula to use when the question asks for

“A unit vector in the direction of v”

Answer 15

Question 16

What is the formula to use when the question asks for

“a vector b of the length k in the same direction as a is”

Answer 16

Question 17

What is the formula to use when the question asks for

“a vector b of the length k which is parallel to a could be”

Answer 17

Question 18

formula for mean velocity

Answer 18