The breakdown voltage of a randomly chosen diode of a certain type of known to be normally
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Question:
The breakdown voltage of a randomly chosen diode of a certain type of known to be normally distributed with mean 40 V and standard deviation 1.5 V.
a. What is the probability that the voltage of a single diode is between 39 and 42?
b. What value is such that only 15% of all diodes have voltages exceeding that value ? what percentile does this value represent for the breakdown voltage distribution ?
c. A random sample of size 9 is drawn from the above normal distribution. let x̅ be the random sample mean.
i. Give the sampling distribution of x̅ with its mean and variance
ii. Obtain P(39.5 < x̅<41.0)
Related Book For
Business Statistics a decision making approach
ISBN: 978-0133021844
9th edition
Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry
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