3.19 The life of a tool bit is normally distributed with mean: t 10 hr variance:...

Question

Question

math Statistics-And-Probability

Answer 1

Answer #1

Solution;-

The L₁₀ of the tool is 7.436 hours.

Mean = 10, S.D = 2

p-value for the L₁₀ = 0.10

z-score for the p-value = -1.282

By applying normal distribution:-

$z = \frac{x-\mu }{\sigma }$

x = 7.436 hours

Answer 2

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