Math, asked by vaidiksharma0004, 11 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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