A history professor gives a quiz to his class and records -1

Question 1

5 out of 5 points

A history professor gives a quiz to his class and records the following scores:

13, 11, 11, 9, 12, 13, 16, 14, 11, 10, 8, 13, 20.

The standard deviation for this distribution is _________. Assume sample scores.

Question 2

5 out of 5 points

A history professor gives a quiz to his class and records the following scores:

13, 11, 11, 9, 12, 13, 16, 14, 11, 10, 8, 13, 20.

The mean for this distribution is _________.

Question 3

5 out of 5 points

Given the following set of scores

X: 10, 12, 6, 8, 9, 11, 13, 13, 5, 0, 1

What is the median?

Question 4

5 out of 5 points

The most commonly encountered measure of central tendency is the _________.

Question 5

0 out of 5 points

Let’s assume that we have determined the salary of all the professors at your school. In plotting the distribution of salaries we notice that it is positively skewed. For this distribution _________.

Question 6

5 out of 5 points

A history professor gives a quiz to his class and records the following scores:

13, 11, 11, 9, 12, 13, 16, 14, 11, 10, 8, 13, 20.

The mode(s) for this distribution is(are) _________.

Question 7

5 out of 5 points

Which of the following do (does) not measure average dispersion?

Question 8

5 out of 5 points

Consider the following scores: 21, 22, 22, 0.1, 20, 25, 28, 26, 23, 19, 0.5. Which of the measures listed below would give the best description of the central tendency of these scores?

 

Question 9

5 out of 5 points

If s = 12 for a set of 200 scores and 5 points were subtracted from each of the scores, the new value of the standard deviation would be _________.

Question 10

5 out of 5 points

On a physics exam, the instructor gives a bonus question worth 10 points. The class average (mean) without counting the bonus question is 83. If everyone gets the bonus question correct, the class mean would _________.

Question 11

5 out of 5 points

Given the following set of scores

X: 10, 12, 6, 8, 9, 11, 13, 13, 5, 0, 1

What is the variance?

Question 12

5 out of 5 points

Which of the following is (are) not true?

Question 13

5 out of 5 points

A history professor gives a quiz to his class and records the following scores:

13, 11, 11, 9, 12, 13, 16, 14, 11, 10, 8, 13, 20.

The median for this distribution is _________.

Question 14

0 out of 5 points

Which of the following is not a measure of variability?

Question 15

5 out of 5 points

For any distribution of scores S (X – μ) = _________.

Question 16

0 out of 5 points

equals _______ .

Question 17

5 out of 5 points

equals _______ .

Question 18

5 out of 5 points

Given the following set of scores

X: 10, 12, 6, 8, 9, 11, 13, 13, 5, 0, 1

What is the range?

Question 19

5 out of 5 points

Consider a distribution with N = 100, = 50, and = 9875. If 10 new scores of 50 were added to the

distribution, what would happen to the sum of squares?

Question 20

5 out of 5 points

If 5 points are added to each score in a distribution, which of the following will happen?