Question

please answer this question​

Answer 1

Solution :-

(a)

Data :-

The information collected by either government or any other agency is called data.

(or)

The information is either in the form of numbers or letters which helps us to take decision is called data .

Raw data :-

The data obtained in original form is called Raw data or Ungrouped data.

Frequency:-

The number of times an observation occurs is called the frequency.

(b)

Bar graph:-

Representing the data with the help of bars or rectangles in a diagram is called a bar graph or a bar diagram.

Double bar graph:-

Representing the data with the help of double bars or rectangles in a diagram is called a double bar graph or double bar diagram.

• Bars of uniform width are drawn with equal spacing between them on x-axis depicting the variable.
• The values of the variables are shown on y-axis.
• The heights if the bars will be proportional to values of the variables.
• In a bar graph we take only one bar for each observation.
• In a double bar graph we take double bars at a time for two observations.
• The bar in the bar graph represents the each observation.
• The bars in the double bar graph represents two observations.