Question

please help fast friends​

Answer 1

Answer:

marks.

150-140

140-130

130-120

120-110

110-100

100-90

90-80

frequency

0-12=-12

12-27=-15

27-60=-33

60-105=-45

105-127=-19

124-141=-17

141-180=-39

180-0=-180

mid value (X)

145

135

125

115

105

190

80

75

cumulative frequency

-12

-27

-60

-105

-124

-141

-180

-360

total of frequency=-360

total of cumulative frequency=-360

median=size of (N/2) th item= size of (-360/2) the item=-180.lt is included in the cumulative frequency -180 .the corresponding median class is 90 -80

using interpolation formula

median =l 1 +(N/2 -cf)/f *c

=90 + -180--141/-39 *10

=90 + -39/-39 *10

=90+10=80

so answer is : median = 80

please mart this answer as a brain list answer friends

Answer 2

Step-by-step explanation:

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