Q. 44.4( 14 Votes )

The number of Sci

Answer :

1. Write the scores in the 1st column, in ascending order as x1< x2< x3...


2. Write the tally marks in the next column.


3. Count the tally marks of scores and write the frequency of the score, denoted as fi


4. Write the sum of all frequencies below the frequency column.


5. The total frequencies are denoted by ‘N’.


6. In the last column write the products Find fi xi



Formula


Where, xi = score ; fi = frequency ; N = total frequency


Mean



= 2.75


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