Download App

Presentation of Data — Economics STD 11 Commerce — Question

CBSE BoardEnglish MediumSTD 11 CommerceEconomicsPresentation of Data6 Marks
Question
Explain briefly different types of graphs.
✓

Answer

Different types of graphs are explained below:
  1. Line Frequency Graph: Line diagrams consist in drawing vertical lines, length of each line being equal to frequency. The values of variate x are presented on a suitable scale along y-axis. Line diagrams facilitate comparison but they are not attractive to see.
  2. Histograms: These graphs are used to graph grouped data. It is one of the most popular and commonly used devices · for charting continuous frequency distribution. It consists of erecting a series of adjacent vertical rectangles on the section of X-axis with bases of equal width of the corresponding class intervals and the heights are so taken that the area of the rectangle are equal to the frequency of the corresponding classes.
  3. Frequency Polygons: A frequency polygon is formed by marking the mid-point at the top of horizontal bars and then joining these dots by a series of straight lines. The frequency polygons are formed as a closed figure with the horizontal axis, therefore a series of straight lines are drawn from the mid-point of the top base of the first and the last rectangles to the midpoint falling on the horizontal axis of the next outlaying interval with zero frequency.
  4. Frequency Curve: It is described as a smooth frequency polygon. A frequency curve is described in terms of its (i) symmetry (skewness) and (ii) degree of peakedness (kurtosis).Two frequency distributions can also be compared by superimposing two or more frequency curves provided the width of their class intervals and the total number of frequencies are equal for the given distributions. Even if the distributions to be compared differ in terms of total frequencies, they still can be compared by drawing per cent frequency curves where the vertical axis measures the per cent class frequencies and not the absolute frequencies.
  5. Time Series Graph: When information is arranged over a period of čime, it is called time series graph. In it, time (hour, day/date, week, month, year, etc.) is plotted along x-axis and the value of the variable (time series data) along y-axis. A line graph by joining these plotted points, thus, obtained is called arithmetic line graph (time series graph).

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "6 Marks Question" from Presentation of Data→Presentation of Data — all question types→Economics STD 11 Commerce question papers→CBSE Board STD 11 Commerce question papers→CBSE Board question paper generator→

Similar questions

Give steps for making frequency polygon.
→

From the following table prepare demand schedule for household B, given demand schedule of household A, C and market demand schedule.

Price (₹)Household A (Units)Household B (Units)Household C (Units)Market Demand (Units)
76-1126
68-1636
512-2251
417-3071
324-4298
→
Calculate weighted aggregative price index from the following data using Fisher's method.
Commodity Base Year Current Year
Price (₹) Quantity Price (₹) Quantity
A 2 10 4 5
B 5 12 6 10
C 4 20 5 15
D 2 15 3 10
→
What is the difference between a price index and a quantity index?
→
The following table gives production yield in kg. per hectare of wheat of 150 farms in a village. Calculate the mean, median and mode values.
Production yield (kg. per hectare)
50-53
53-56
56-59
59-62
62-65
65-68
68-71
71-74
74-77
Number of farms
3
8
14
30
36
28
16
10
5
→
Explain the causes for a leftward shift of demand curve.
→
Derive market demand schedule of the individuals Rahul, Rohan and Rohit.
Price (₹)Demand of Rahul (Units)Demand of Rohan (Units)Demand of Rohit (Units)
171012
2689
3567
4445
5323
→
The minimum temperature of Shimla in the last week of December is given below.
Date
Tempreature
25th Dec
3ºC
26th Dec
-1ºC
27th Dec
-2ºC
28th Dec
2ºC
29th Dec
4ºC
30th Dec
-3ºC
31th Dec
-4ºC
Represent the above data with the help of suitable diagram.
→
Explain various functions of statistics.
→
Explain important terms related to a frequency distribution.
→