Math, asked by vaidiksharma0004, 9 months ago

School is organized slogan competition on "SAVE ENVIRONMENT” for all classes. The following frequency distribution gives the number of slogans submitted by all the students:
No. of slogans 11-15 16-20 21-25 26-30 31-35 36-40 41-45 46-50
No. of Students 2 3 6 1 7 14 12 4 2
Find the mean, variance and standard deviation.​

Answers

Answered by amitnrw
0

Given :   slogan competition on "SAVE ENVIRONMENT”  frequency distribution gives the number of slogans submitted by all the students:

To find : Mean of Data

Solution:

No. of slogans    f        Mean Slogan   A= (mean -28)/5     f * A

11-15                     2                   13          -3                               -6

16-20                   3                   18           -2                              -6

21-25                  6                    23          -1                              -6

26-30                 7                    28           0                              0

31-35                  14                   33          1                              14

36-40                  12                  38          2                              24

41-45                   4                    43          3                             12

46-50                 12                  48           4                             48

                        60                                                                  80

Mean = 28  + 5 * ( 80)/ 60

= 28 + 6.67

= 34.67

Mean number of Solgans  = 34.67

Learn more:

Find the mean deviation about mean for the following distribution ...

https://brainly.in/question/7791499

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