Measures of Variability and Central Tendency

The number of text messages that Isaac received each day for a week is shown: 47, 49, 54, 50, 48, 47, 55
What is the mean and median

• Mean=49
  Median=54
• Mean=49 
  Median=50
• Mean=50 
  Median=54
• Mean=50
  Median=49

The numbers of runs scored by a softball team in 20 games are given.
 3, 4, 8, 12, 7, 5, 4, 12, 3, 9, 11, 4, 14, 8, 2, 10, 3, 10, 9, 7
What is the Interquartile Range.

• IQR = 6
• IQR = 10
• IQR = 7.5
• IQR = 12

The range is the difference between the greatest and the least data values.

• True
• False

Quartiles are values that divide a data set into four equal parts.

• True
• False

The interquartile range (IQR) of a data set is the difference between the third and first quartiles. It represents the range of the middle half of the data.

• True
• False

Given the data: 21, 31, 26, 24, 28, 26
This is a 3 part question:
Part-1: What is the mean of the data?

• 24
• 25
• 26
• 27

Given the data: 136, 150, 119, 150, 125, 143.
Find the range. 

• Range = 136 - 125 = 21.
• Range = 150 - 125 = 75.
• Range = 150 - 125 = 25.
• Range = 150 - 119 = 31

An outlier is a value in a data set that is much greater or much less than most of the other values in the data set. 

• False
• True

What is the mode of the data?

• 1 book
• 9 books
• 3 books
• 0 books

How many cities have temperatures between 70 degrees and 99 degrees?

• 44
• 34
• 26
• 62