Question

class=70-74,75-79,80-84,85,89
frequency =3,4,5,8
From the above frequency distribution table find out the frequency density of the first class​

Answer 1

Answer:

Solution

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Given frequency table

Class interval frequency

75 -79

8

80 -84

10

85 -89

6

90 -94

5

The lower limit of a class interval - Upper limit of the succeeding class interval =80−79=1

∴

2

1

=0.5

convert the classes by subtracting 0.5 from lower limits and adding 0.5 from upper limits.

then the continuous grouped frequency table

class interval

frequency

75−0.5 79+0.5 8

80−0.5 84+0.5 10

85−0.5 89+0.5 6

90−0.5 94+0.5 5

⇒

Class interval frequency

74.5−79.5

8

79.5−84.5

10

84.5−89.5 6

89.5−94.5 5