Data Analysis

What can distort (significantly change) the mean?

• Not putting them in order

• A normal data distribution

• The outlier

What percent of the data is in the box on the box-&-whisker plot?

• 25%

• 50%

• 75%

• 100%

What is the median on the Box and Whiskers?

• 65

• 90

• 78

• 97

What is the IQR (Interquartile Range) on the Box and Whisker?

• 98-54=44

• 67-54=13

• 90-78=12

• 90-67=23

How do you find the mean of a data set?

• Put the data in order from least to greatest and find the middle number.

• Add all the data values and divide by the number of data values.

• It is the number that appears the most.

• Subtract the minimum from the maximum.

What is the median?

• The middle number when the number is in order least to greatest

• The sum of the data values divided by the number of data values

• The number that appears the most.

• The largest number less the smallest number.

What is the mode?

• Put the number in order from least to greatest and find the middle number.

• Add all the number and divide by how many numbers there are.

• The number that appears the most.

• The largest number less the smallest number.

How do you find the median when you have two numbers in the middle of the data set?

• Subtract the two numbers

• Add the two numbers

• Add the two numbers and divide by 2

• Multiply the two numbers

What label is along the y-axis in this graph?

• Number of Teens

• Age in Years

• Lines

• Frequency Table

At which age do the least amount of teens have a cell phone?

• 18
• 14
• 13
• 15