Measures of Central Tendency

The number of pages that Carolyn wrote in her journal each day from Monday to Friday is shown below: 
9, 8, 12, 6, 10
What is the mean number of pages she wrote per day?

• 5
• 6
• 9
• 11

The heights of six students in a class are given below:
158cm     172cm      164cm
164cm     167cm      159cm
 However, there were actually seven students in the class, and the mean height in the class was 165 cm. What was the height of the unknown student?

• 164 cm
• 166 cm
• 171 cm
• 169 cm

Roger bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is Roger's median score?

• 127
• 155
• 156
• 193

The heights of some students are given.
158cm     172cm      164cm
164cm     167cm      159cm
 What is the range of the heights?

• 13cm
• 14cm
• 164cm
• 330cm

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

• median:7  mode:3  range:10
• median:6  mode:3  range:7
• median:7  mode:3 range:8

How many students scored more than 80%?

• 10
• 13
• 7
• 15

The stem-and-leaf plot shows the age of all the U.S. Olympic Soccer Team players. Find the median age of the players.

• 26.5

• 26

• 25

• 25.5

Positive Skewness is where the graph

• has a tail that extends out to the right

• has a tail that extends out to the left

• is bell shaped

• is a frequency polygon

33, 25, 42, 25, 31, 37, 46, 29, 38
What is the interquartile range of the data?

• 8
• 9
• 13
• 21

What is the standard deviation for the data given:
{12, 13, 29, 18, 61, 35, 21}

• 293.67
• 15.87
• 17.14
• 41.98