Center and Variability

Multiple Choice

Find the mean:
28, 18, 19, 18, 17

• 20
• 18
• 11
• 19

Multiple Choice

Christian has six grades from tests and IXL. They are all weighted equally. If Christian's grades are 100, 96, 96, 88, 70, and 100, what is the current average grade? (Round to the nearest whole number)

• 90

• 91

• 92

• 93

Multiple Choice

What is the median of this data set?
3 , 17 , 17 , 11 , 8 , 13 , 5 , 18

• 11
• 12
• 13
• 17

Multiple Choice

The cost of four cell phones are $345, $400, $110, and $640.
What is the median cost?

• $330
• $390
• $372.50
• $375

Multiple Choice

What is the mode?

• # happening the most
• the average
• biggest - smallest
• the middle #

Multiple Choice

At Donald's Donuts the number of donut holes in a bag can vary. Help Donald find the mode.
12,10,10,10,13,12,11,13,10

• 13
• 12
• 11
• 10

Multiple Choice

Ervin bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the range of Ervin's scores?

• 193
• 127
• 60
• 66

Multiple Choice

Find the median, mode and range: 
3, 5, 7, 9, 11, 8, 3

• median: 7  mode: 3  range: 7

• median: 6  mode: 3  range: 7

• median: 7  mode: 3  range: 8

Multiple Choice

To find the _________ you add up all the numbers and then divide by how many numbers you have.

• Mean
• Median
• Mode
• Range

Multiple Choice

Ervin bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the sample standard deviation of Ervin's scores?

Note use the stdevp function in desmos.

• 511.33

• 22.61

• 438.48

• 20.94

Multiple Choice

In a population of five university students with GPAs of 2.5, 2.3, 1.7, 1.4, and 1.1, a sample of three students are considered. What would be the standard deviation of the resulting sampling distribution? Note use the stdevp function in desmos.

• 0.53

• 0.41

• 0.35

• 0.22