Data Handling & Presentation MCQ Test — Class 6 CBSE

Solution:

Data refers to the unorganized facts, figures, and information collected from various sources.

Before data can be analyzed or presented, it exists in its raw form.

Therefore, raw facts and figures are the best description of data.

Solution:

Go through the list of responses and count every time 'Red' appears.

The list is: Red, Blue, Green, Red, Yellow, Blue, Red, Green, Blue, Red.

Counting 'Red' gives: 1 (first), 2 (fourth), 3 (seventh), 4 (tenth).

So, 4 students chose 'Red'.

Solution:

Tally marks are grouped in fives for easy counting.

A group of five is represented as |||| (four vertical lines with a diagonal line through them).

To represent 8, we need one group of five and then three more individual tally marks.

So, 8 is represented as |||| |||.

Solution:

Total number of students who chose 'Cricket' = 25.

Value represented by one cricket bat symbol = 5 students.

Number of symbols needed = (Total students) / (Value per symbol).

Number of symbols = 25 / 5 = 5.

Solution:

The key states that 1 flower symbol (🌷) represents 10 flowers.

For 'Roses', there are 4 flower symbols.

Total number of roses = Number of symbols × Value per symbol.

Total number of roses = 4 × 10 = 40.

Solution:

Raw data is often unorganized and difficult to understand.

Organizing data, such as using tally marks or putting it into a table, helps in systematic arrangement.

This organized form makes it much simpler to analyze trends, compare values, and extract meaningful information, leading to better conclusions.

Solution:

The scale on a bar graph's axis (usually the vertical axis for frequency) defines how much each unit on the axis represents.

For example, if the scale is 1 unit = 5 items, then a bar reaching 3 units on the axis would represent 15 items.

Choosing an appropriate scale ensures that the height or length of each bar accurately reflects the data value it represents, allowing for correct comparison and interpretation.

Solution:

The attendance for each day is: Monday (20), Tuesday (35), Wednesday (15), Thursday (40), Friday (30).

To find the day with the least attendance, we need to identify the smallest number among these values.

Comparing the numbers (20, 35, 15, 40, 30), the smallest value is 15.

15 corresponds to Wednesday, so Wednesday had the least attendance.

Solution:

Pictographs use symbols to represent data, which makes them visually appealing and easy to understand at a glance.

They are most effective when representing approximate quantities or when the data values are multiples of the chosen symbol's value.

For exact measurements or continuous data (like temperature changes or precise heights), bar graphs or other graphs are usually more suitable.

Representing the approximate number of animals in a zoo with animal symbols is a classic and effective use of a pictograph.

Solution:

The key in a pictograph tells us what quantity each symbol stands for (e.g., 1 car symbol = 10 cars).

Without this key, you might see 5 car symbols, but you wouldn't know if that means 5 cars, 50 cars, or 500 cars.

Therefore, the key is essential for accurately interpreting the numerical values from the pictograph.