# Free Presentation of Data 02 Practice Test - 11th Grade - Commerce

### Question 1

#### SOLUTION

Solution :A

Footnotes are not mandatory and are mostly used to simply explain a feature of the table that is neither self explanatory nor one that’s been explained before.

### Question 2

Sometimes presentation of data precedes organisation of data.

#### SOLUTION

Solution :B

In all circumstances, organisation of data precedes presentation of data. Only when the data are organised, it can be understood and be presented in the right way.

### Question 3

A database consists of the poverty levels of all the states in India for the last 10 years. In order to present the data of the most and the least poor states in the last 5 years, which of the following can be used to show it on a graph?

#### SOLUTION

Solution :A

Since the data to be presented has 2 bars of the same category(the most poor and the least poor) and it is required to show the trends of these in the last 5 years, multiple bar diagram is the best suited for a graph.

### Question 4

To present the data about the total sales of four car manufacturers along with the sales of individual models for a year, which of the following is the most appropriate?

#### SOLUTION

Solution :C

Since the total sales and the breakdown of sales by models are required to be presented for each manufacturer, we can make use of component bar diagrams for this purpose. If only the total sales were required, a simple bar diagram would have sufficed.

### Question 5

The height of a histogram does not represent the frequency of the corresponding class interval.

#### SOLUTION

Solution :A

Area of the rectangle represents the frequency of the class interval considered.

### Question 6

More than ogive is a

#### SOLUTION

Solution :A

For more than ogive, more than cumulative frequencies are plotted against the lower class boundaries of that class. Here, frequencies are subtracted from the total, starting from the lower limit of the 1st class interval of the frequency distribution. The cumulative total tends to decrease or remain the same. Hence it is a non-increasing graph.

### Question 7

Bar diagrams can be plotted only for:

#### SOLUTION

Solution :A

Bar diagram comprises a group of equi-spaced and equi-width rectangular bars for each class or category of data. It is plotted only for discrete data.

### Question 8

ClassFrequency50−601260−808 ClassFrequency50,000−1,00,000121,00,000−1,50,00010

What is/are missing in the above tables?

#### SOLUTION

Solution :A, B, and D

Without the unit of measurement, it is not understood if income is given in 1000's of Rupees, or Rupees. Indexing or adding table number helps in identification and understanding of the given information. Lastly, there is no title to these tables. Hence nothing can be inferred from the given data.

### Question 9

Calculate the percentage of profits earned approximately by Company A in 2015-16 and Company B is 2016-17.

20% - Company B

46% - Company B

46% - Company B

48% - Company B

#### SOLUTION

Solution :C

For company A ,

% of profits earned in 2015 - 16

=250600×100

= 42%

For company B,

% of profits earned in 2015 - 16

=300650×100

= 46%.

### Question 10

MonthlyCumulativeWagesFrequency(in Rupees)less than 2015less than 5035less than 8045less than 11095

The ogive corresponding to the above cumulative frequency distribution will be a non-decreasing graph.

#### SOLUTION

Solution :A

All less than ogives are non-decreasing graphs. As you go down the class interval, cumulative frequencies can only increase or stay the same.