Question

A sample of 25 measurements on a normally distributed quality characteristic has a mean of 85 and a standard deviation of 1. Using a confidence probability of 0.95, find a value such that 90% of the future measurements on this quality characteristic will lie above it?

Answer 1

Answer:

Step-by-step explanation:

Given that:

• n = 25
• α = 0.01
• γ = 0.95 one sided
• x ~ N (85, 1)

From Appendix VIII: K= 1.838

So: x - KS = 85 - 1.838(1)  = 83.162

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