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Post a LessonAnswered on 19 Apr Learn CBSE/Class 10/Mathematics/UNIT VII: Statistics and probability/Statistics
Sadika
To find the correct mean, we first need to adjust the sum of the observations by adding the difference between the correct value of 125 and the wrongly noted value of 25. Then we can divide this adjusted sum by the total number of observations.
Answered on 19 Apr Learn CBSE/Class 10/Mathematics/UNIT VII: Statistics and probability/Statistics
Sadika
To find the mean of the 32 numbers, we can use the concept of weighted averages.
Given:
Let's denote:
Answered on 03/01/2022 Learn CBSE/Class 10/Mathematics/UNIT VII: Statistics and probability/Statistics
Swati R.
NET JRF qualified and preparing for PhD..
First 10 Natural numbers are:- 1,2,3,4,5,6,7,8,9,10
Mean = Sum of all numbers/ total number of observations
= 1+2+3+4+5+6+7+8+9+10 / 10
= 55/ 10
= 5.5
Therefore, 5.5 is the mean of first 10 natural numbers
read lessAnswered on 03/01/2022 Learn CBSE/Class 10/Mathematics/UNIT VII: Statistics and probability/Statistics
Swati R.
NET JRF qualified and preparing for PhD..
in this question mean is already given and we know that:-
mean = sum of total numbers / total number of observations
15 = 2+6+7+a / 4
15*4 = 15+a
60 = 15+a
60-15 = a
a= 45
now we have found the value of a=45, we will put this value in second series:-
mean = sum of all numbers / total number of observations
50 = 6+18+1+45(value of a) + b / 5
50*5 = 70 + b
250 = 70 + b
b = 250 - 70
b = 180
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