Since there is a gap of 1 between intervals
We add Β½ to upper limit, and subtract Β½ to lower limit
Now, letβs find mean
Mean(π₯ Μ ) = a + h Γ (ββππππ)/(ββππ)
Where
a = Assumed mean
h = Class interval
Also,
ββππ = 40
ββππππ = β9
Putting values in formula
Mean(π Μ ) = a + h Γ (ββππππ)/(ββππ)
π₯ Μ = 149 + 9 Γ (β9)/40
π₯ Μ = 149 β 2.025
π Μ = 146.975
Thus, Mean length of leaves is 146.975
Made by
Davneet Singh
Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo
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