Question

Please Help @Muzzack

Answer 1

Frequency Tables

The frequency of a particular data value is the number of times the data value occurs.

For example, if four students have a score of 80 in mathematics, and then the score of 80 is said to have a frequency of 4. The frequency of a data value is often represented by f.


A frequency table is constructed by arranging collected data values in ascending order of magnitude with their corresponding frequencies.

Answer 2

Example 1

The marks awarded for an assignment set for a Year 8 class of 20 students were as follows:
6 7 5 7 7 8 7 6 9 7
4 10 6 8 8 9 5 6 4 8

Present this information in a frequency table.

Answer 3

Solution:

To construct a frequency table, we proceed as follows:

Step 1:

Construct a table with three columns. The first column shows what is being arranged in ascending order (i.e. the marks). The lowest mark is 4. So, start from 4 in the first column as shown below.

Answer 4

Step 2:

Go through the list of marks. The first mark in the list is 6, so put a tally mark against 6 in the second column. The second mark in the list is 7, so put a tally mark against 7 in the second column. The third mark in the list is 5, so put a tally mark against 5 in the third column as shown below.

Answer 5

Step 3:

Count the number of tally marks for each mark and write it in third column. The finished frequency table is as follows:

Answer 6

In general:

We use the following steps to construct a frequency table:

Step 1:

Construct a table with three columns. Then in the first column, write down all of the data values in ascending order of magnitude.

Step 2:

To complete the second column, go through the list of data values and place one tally mark at the appropriate place in the second column for every data value. When the fifth tally is reached for a mark, draw a horizontal line through the first four tally marks as shown for 7 in the above frequency table. We continue this process until all data values in the list are tallied.

Step 3:

Count the number of tally marks for each data value and write it in the third column.

Answer 7

@Hero right