AQ2.1

[Mohan Palanisamy]

Can any one Derive how to get the answer.

A cab driver got the rating as feedback from 20 customers on a given day which are as follows:

7 9 8 xx 6 9 7 5 9 10 7 8 9 8 8 7 10 6 6 9

1 point

If the relative frequency of rating 7 is 0.25, then what is the value of xx?

 7

 8

 9

 Data insufficient

No, the answer is incorrect.
Score: 0

Accepted Answers:

7

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Regards

Mohan

Mobile 9663368039

[soniya duge]

Here you have got as below and we do not know where to place x.

Total frequency is 20.

ratings       frequency       relative frequency

  5                  1

  6                  3

  7                  4                     0.25

  8                  4

  9                  5

 10                 2

Relative frequency for 7 is given as 0.25

we know Relative Frequency = Frequency/Total Frequency

0.25 = F/20

F = 20 x 0.25

F = 5

We have got 4 as frequency for 7 so the value of x is 7

Thanks & Regards,

Soniya Duge

[Prince Lal]

Thanks for clearing the doubt in this question. 

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Mr. Prince Lal

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