In a ? chart with L = 3 and ?¯ = 0.5, what is the minimum...

Question

Question

In a ? chart with L = 3 and ?¯ = 0.5, what is the minimum number of samples to collect to ensure that LCL >0?

(a) 7

(b) 8

(c) 9

(d) 10

math Statistics-And-Probability

Answer 1

Answer #1

Answer

Minimum sample n is given as

n > ((1-p)*L^2)/p

setting p =0.5 and L = 3

we get

>((1-05)*3^2)/0.5

>(0.5*9)/0.5

> 9

So, option C is correct

Answer 2

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