A lot of 75 washers contains 6 defectives whose variability in thickness is unacceptably large. A sample of 10 washers is selected at random without replacement.
A lot of 75 washers contains 6 defectives whose variability in thickness is unacceptably large. A sample of 10 washers is selected at random without replacement.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
A lot of 75 washers contains 6 defectives whose variability in thickness is unacceptably large. A sample of 10 washers is selected at random without replacement.
1. Find the probability that at least one unacceptable washer is in the sample.
2. Calculate the mean of (x).
3. Calculate the variance of (x).
4. Calculate the standard deviation of (x).
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