Question

270
14.6 Summary
In this chapter, you have studied the following points:
1. Facts or figures, collected with a definite purpose, are called data.
2. Statistics is the area of study dealing with the presentation, analysis and interpretations
3. How data can be presented graphically in the form of bar graphs, histograms and frequency
data.
polygons.
4. The three measures of central tendency for ungrouped data are:
Mean : It is found by adding all the values of the observations and dividing it by the
PROBA
total number of observations. It is denoted by K.
ZF
x,
1 = 1
So, a = 1=1 . For an ungrouped frequency distribution, it is a
п
ES
15
(ii) Median : It is the value of the middle-most observation (s).
n+1th
If n is an odd number, the median = value of the
2
observation.
and
6+
Ifn is an even number, median = Mean of the values of the
observations.
(iii) Mode : The mode is the most frequently occurring observation.​

Answer 1

Answer:

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