Define the terms:
(i) Data
(ii) Raw data
(iii) Array
(iv) Tabulation of data
(v) Observation
(vi) Frequency of an observation
(vii) Statistics
A die was thrown 20 times and the following outcomes were recorded:
5, 2, 1, 3, 4, 4, 5, 6, 2, 2, 4, 5, 5, 6, 2, 2, 4, 5, 5, 1.
Arrange the above data in ascending order and prepare the frequency table.
The daily wages (in ₹) 0f 15 workers in a factory are given below:
400, 360, 300, 300, 260, 360, 360, 400, 300, 260, 360, 360, 400, 300, 360
Write the data given below in ascending order and prepare the frequency table.
7, 8, 7, 10, 6, 8, 9, 7, 10, 5, 7, 6, 8, 5, 6, 7, 8, 9, 7, 6, 7, 8
Fill in the blanks:
(i) Data means information in the form of …… figures.
(ii) Data obtained in the ……… form is called raw data.
(iii) Arranging the numerical figures in ascending or descending order is called an ……..
(iv) The number of times a particular observation occurs is called its ……….
(v) Arranging the data in the form of a table is called ……… of data.
Find the mean of first five natural numbers.
Find the mean of first six odd natural numbers.
Find the median of:
(i) 3, 11, 7, 2, 5, 9, 9, 2, 10
(ii) 9, 25, 18, 15, 6, 16, 8, 22, 21
(iii) 21, 15, 6, 25, 18, 13, 20, 9, 16, 8, 22
(i) 10, 32, 17, 19, 21, 22, 9, 35
(ii) 55, 60, 35, 51, 29, 63, 72, 91, 85, 82
Find the median of first 15 odd numbers.
Find the median of first 10 even numbers.
Find the median of first 50 whole numbers.
Find the mode of the data:
(i) 10, 8, 4, 7, 8, 11, 15, 8, 6, 8
(ii) 27, 23, 39, 18, 27, 21, 27, 27, 40, 36, 27
The ages (in years) of 11 cricket players are given below:
28, 34, 32, 41, 36, 32, 32, 38, 32, 40, 31
Find the mode of the ages.
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