Q. 6 4.8( 6 Votes )

An aircraft has 120 passenger seats. The number of seats occupied during 100 flights is given in the following table.

Determine the mean number of seats occupied over the flights.

Answer :

We first, find the class mark of each class and then proceed as follows.

Assumed mean, a = 110

Class width, h = 4

and total observations, N = 100

By step deviation method,


But seats cannot be in decimal, so number of seats is 109.

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