Grouped Distribution Frequency

Identify the three mistakes in the frequency distribution table.

Anything highlighted in green as verified as correct already.

Lake samples are taken from around the country to assess the nitrate levels in the water. The levels, in parts per million, are given in the frequency distribution table adjacent.

The modal class is

• 0 - < 3

• 3 - < 5

• 5 - < 7

• 7 - < 9

Lake samples are taken from around the country to assess the nitrate levels in the water. The levels, in parts per million, are given in the frequency distribution table adjacent.

The range of the data is

• 9

• 11

• Unable to be determined from the frequency table.

• 43

What is the modal class of this distribution?

• 20-29

• 30-39

• 40-49

• 50-59

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

• 24

• 8

• 18

• 10

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?

• [8 - 8,5)

• [7 - 7,5)

• [7,5 - 8)

• [5 - 5,5)

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

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