Frequency Distributions and Their Graphs

Find the cumulative frequencies.

• 28, 56, 84, 100

• 28, 58, 70, 72, 74, 76

• 33%, 37%, 20%, 7%, 7%, 7%

• 28, 30, 12, 2, 2, 2

Look at the frequency distribution. Find the class boundaries.

• 21, 31, 41, 51, 61, 70, 80

• 25.5, 35.5, 45.5, 55.5, 65.5, 75.5

• 20.5, 30.5, 40.5, 50.5, 60.5, 70.5

• 30, 40, 50, 60, 70, 80

In the given table, what is the class size?

How many classes are there?

• 6

• 30

• 1-5

• 1-30

Observe the histogram and choose the frequency distribution that corresponds to it.

• 
• 

The following data set shows the minutes spent on internet by 50 internet users. Use seven classes to construct a frequency distribution. What's the class width?

• 11

• 12

• 7

• 86

percentage or portion of data that falls in each class

• frequency distribution

• midpoint

• relative frequency

• cumulative frequency

• range

Which of the following is the correct formula to find class width?

• (max-min)/(# of classes), round up to the next integer

• (max-min)/2, round up to the next integer

• (max-min)/(# of classes), round normally

• (max+min)/2, round normally

• (max-min)/(number of data), round up to the next integer

Use the frequency histogram to determine the class width

• 7

• 8

• 9

• 10

Use the frequency polygon to identify the class with the greatest frequency.

• 20.5 - 23.5

• 29.5 - 32.5

• 35.5 - 38.5