# Let’s assume that we have determined the salary of all

Question 1

5 out of 5 points

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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 2

5 out of 5 points

If 10 points were added to each score in a distribution, which of the following will happen?

Question 3

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 4

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 5

5 out of 5 points

is called _________.

Question 6

5 out of 5 points

An industrial psychologist observed 8 drill-press operators for one working day. She recorded the number of times each operator pressed the “faster” button instead of the “stop” button to

determine whether the design of the control panel was contributing to the high rate of accidents in the plant. The resulting scores were as follows:

5, 2, 8, 2, 3, 2, 4, 12

The mean for this distribution is _________.

Question 7

5 out of 5 points

A distribution has a mean of 78 and a median of 92. This distribution is _________.

Question 8

5 out of 5 points

equals _______ .

Question 9

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 10

5 out of 5 points

Which of the following is not a measure of central tendency?

Question 11

5 out of 5 points

An industrial psychologist observed 8 drill-press operators for one working day. She recorded the number of times each operator pressed the “faster” button instead of the “stop” button to determine whether the design of the control panel was contributing to the high rate of accidents in the plant. The resulting scores were as follows:

5, 2, 8, 2, 3, 2, 4, 12

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

Question 12

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 mean?

Question 13

5 out of 5 points

In a bell-shaped distribution, _________.

Question 14

5 out of 5 points

The mean is _______ sensitive to extreme scores than the median.

Question 15

5 out of 5 points

The mean number of students in a classroom at school A is 32.5 and there are 25 classrooms. The mean number of students at school B is 29.6 in 12 classrooms. At school C the mean in each class is 15.3 for 10 classrooms. What is the mean number of students per classroom for all the schools combined?

Question 16

5 out of 5 points

The most commonly encountered measure of variability is _________.

Question 17

5 out of 5 points

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

Question 18

5 out of 5 points

If a constant of 5 is subtracted from all of the scores, the standard deviation _________.

Question 19

0 out of 5 points

equals _______ .

Question 20

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?