a. q. 3.2 question no 4

Sanskar Rajput

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Oct 31, 2020, 4:03:56 AM10/31/20

to Discussion forum for Statistics for Data Science I

sir ,

how to solve this problem ?

Statistics 1 Support 1

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Oct 31, 2020, 6:02:11 AM10/31/20

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Hi,

Frequencies for different ratings are given in the graph. Use the formula of mean when frequencies are given. It is given in the lectures.

Thanks,

Nitin Jha

Course support team

Kamakshi Sosale

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Oct 31, 2020, 10:03:42 PM10/31/20

to Discussion forum for Statistics for Data Science I, stats1-...@onlinedegree.iitm.ac.in, sanskarr...@gmail.com

I got the average rating as 4, but the accepted answer is in the range (2.9, 3). I checked the calculations repeatedly, Total number of observations is 977, total rating is 3927, need help in figuring out where I went wrong.

Thanks for the help.

K.

Smiley Boy

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Oct 31, 2020, 10:19:48 PM10/31/20

to Kamakshi Sosale, Discussion forum for Statistics for Data Science I, stats1-...@onlinedegree.iitm.ac.in, sanskarr...@gmail.com

From the given data

Total number of ratings (78+192...+62)=977

Relative frequency for each ratings

1*78=78

2*192=384

3*425=1275

4*220=880

5*62=310

sum of relative frequency = 2927

avg =2927/977=2.999 or 2

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Thanks.!

Bala :)

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