7th Maths : Term 3 Unit 5 : Statistics : Summary

**Summary**

● Based on the purpose, appropriate data
has to be collected and organised to find the representative of data.

● Representative of data are also known
as measures of central tendency.

● Arithmetic mean is the most commonly
used representative of data and is calculated by the formula.

Arithmetic Mean = Sum of all observations
/ Number of observations

● Mode is the value of the data which occurs maximum
number of times.

● A data may have more than one mode
as well as no mode.

● A data is of large size, mode can be
found out after grouping.

● Median is the middle most value of
the given data.

● To find the median for the given data,

(i) arrange
the data in ascending or descending order.

(ii) If the number of terms (n) is odd,
then{ [n + 1]/2} ^{th } term is the median.

(iii) If the number of terms (n) is even,
then average of (n/2)^{th} and ([n/2]+ 1)^{th} terms is the median

** **

__ICT Corner__

**Statistics**

**Expected outcome**

**Step – 1**

Open the Browser and type the URL Link
given below (or) Scan the QR Code. GeoGebra work sheet named “Mean-Median-Mode”
will open. Change the number of students by typing your number. Right side you can
see the Mean, Median and Mode.

**Browse in the link**

**Mean-Median-Mode:** https://www.geogebra.org/m/ f4w7csup#material/sanzgm9n or Scan
the QR Code.

Tags : Statistics | Term 3 Chapter 5 | 7th Maths , 7th Maths : Term 3 Unit 5 : Statistics

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7th Maths : Term 3 Unit 5 : Statistics : Summary | Statistics | Term 3 Chapter 5 | 7th Maths

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