Question

fit a normal distribution to the following data: Marks 0-10 10-20 20-30 30-40 40-50 frequency 3 5 8 3 1 use area method.

Answer 1

Answer:

Explanation:

ANSWER

Class Interval  frequency  (fi)  Mid value  fixi

0-10  12  5  60

10-20  16  15  240

20-30  6  25  150

30-40  7  35  245

40-50  9  45  405

                                                                 N=∑fi=50                                     ∑fixi=1100

∴Mean=  

∑fi

∑fixi

​  

=  

50

1100

​  

=22

Answer 2

Answer:

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