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 is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.
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