Statistics of Grouped Data

In a grouped data, in what class can the median be found?

• Mean class

• Median class

• Modal class

• Middle class

What is the modal class of this distribution?

• 20-29

• 30-39

• 40-49

• 50-59

What is the modal class of this distribution?

• [8 - 8,5)

• [7 - 7,5)

• [7,5 - 8)

• [5 - 5,5)

What is the cumulative frequency of the modal class in this distribution?

• 24

• 8

• 18

• 10

What is the cumulative frequency of the median class in this distribution?

• 14

• 15

• 24

• 9

What is the class size of the grouped data ?

• 10

• 4

• 15

• 5

The value of X in the table is

• 32

• 70

• 35

• 38

The table shows the distribution of the number of hours worked each week (on average) for a sample of 100 community college students. The mean

• 50

• 34.6

• 20

• 36.8

This data represents the age distribution of a sample of 100 people covered by health insurance (private or government). The sample was taken in 2003. The mean of this data set is

• 52

• 25

• 44

• 32

The data presented in the table have a mean value of:

• 172

• 161

• 157

• 184