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  • Answer please! - Statistics and Probability - JEE Main-2

What is the crf for class interval 40 - 50?

class \; \; \; \; \; \; \; \; \; \: frequency

10-20 \; \; \; \; \; \; \; \; \; \: 3

20-30 \; \; \; \; \; \; \; \; \; \: 5

30-40 \; \; \; \; \; \; \; \; \; \: 8

40-50 \; \; \; \; \; \; \; \; \; \: 4

50-60 \; \; \; \; \; \; \; \; \; \: 10

  • Option 1)

    0.3\bar{3}

     

     

     

  • Option 2)

    0.6\bar{6}

  • Option 3)

    0.\bar{16}

  • Option 4)

    0.4\bar{8}

 

Answers (1)

best_answer

As we learned 

 

Cumulative relative frequency distribution -

The cumulative relative frequency of any value is similarly defined as the relative frequency of the value plus the relative frequencies of all smaller values.

ex :                 x                 1/N=fr                      c.r.f

                      0                  0.08                        0.08

                      1                  0.16                        0.24

                      2                  0.16                        0.40

                      3                  0.24                        0.64 

-

 

 

Since N=3+5+8+4+10=30

and\; cf=20

Thus crf=\frac{20}{30}=0.67

 


Option 1)

0.3\bar{3}

 

 

 

Option 2)

0.6\bar{6}

Option 3)

0.\bar{16}

Option 4)

0.4\bar{8}

Posted by

Himanshu

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