Question

The shoppers who come to a departmental store are marked as: man (M), woman (W), boy (B) or girl (G). The following list gives the shoppers who came during the first hour in the morning:
W W W G B W W M G G M M W W W W G B M W B G G M W W M M W W W M W B W G M W W W W G W M M W W M W G W M G W M M B G G W
Make a frequency distribution table using tally marks. Draw a bar graph to illustrate.

Answer 1

Here, we will make tally marks by keeping count while drawing marks and remember to draw every fifth mark across the previous 4 marks, so we can easily see groups of 5 according to the number of shoppers and form a table. Then we will make the bar graph using the obtained table with four bars for Woman, Man, Boy and Girl.

Complete step by step solution:
We are given that the shoppers who come to a departmental store are marked as: man (M), woman (W), boy (B) or girl (G) and the list is W W W G B W W M G G M M W W W W G B M W B G G M W W M M W W W M W B W G M W W W W G W M M W W M W G W M G W M M B G G W.

We know that a tally mark is a way of keeping count by drawing marks and every fifth mark is drawn across the previous 4 marks, so we can easily see groups of 5.

Now, we will form a table for tally marks with shoppers M, W, B and G from the given wages of 30 workers, we get

We will now form a table to calculate the frequency of the tally marks from the above graph, we get

We will make the bar graph now taking the $x$–axis to be the shopper and the $y$–axis for the number of people from the above table.

Let us also take 1 unit length of 5 people.

Note:
Students need to know that in tally marks to keep count of marks, every fifth mark is drawn across the previous 4 marks, so we can easily see groups of 5. Do not forget to draw the fifth marks across the previous 4 marks or else the answer will be wrong. This is a simple problem, be careful while finding the shopper for each bar.