Approximation to the binomial
A motel accepts 340 reservations for 315 rooms on July 1, expecting 10 percent no-shows on average from past records. Use the normal approximation to the binomial to find the probability that all guests who arrive on July 1 will receive a room.
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The thickness of wafers in semiconductor manufacturing has a mean of 10 micrometers and standard deviation of 0.8 micrometers. Find approximate probability that the average thickness of 49 wafers exceeds 10.15 micrometers.
The compressive strengths of a random sample of 64 specimens of an alloy yielded sample average strength of 5566 psi and sample standard deviation of 82 psi. Find a 95% confidence interval for the true average strength if the alloy.
Let X1, X2 be a random sample of size 2 from a population X with E(X)=mu and V(X) = 36. Let T1 = (2X1 + X2)/3 and T2 = (3X1 - X2)/3 be two unbiased estimators for mu.
Then respond to the following: What are some of the factors you would want to consider in assessing such a difference in mortality? Discuss possible explanations as to why the crude mortality rate is lower in Haiti than in the United States.
A student has computed that it takes an average (mean) of 16 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to an early class. One day it took the student 21 minutes to get to class. How many standard dev
Messages arrive at an interactive message center according to a counting process with the average inter-arrival time of 15 seconds. Choosing a frame size of 5 seconds, compute the probability that during 200 minutes of operation, no more than 750
The lifetime of a disposable water filter is normally distributed with mean m = 30 gallons and standard deviation s = 6 gallons. What is the probability that a filter selected at random will last from 36 to 42 gallons?
Annual starting salaries for college graduates with degrees in business adminstration are generally expected to be between $30,000 and $45,000 with a population standard deviation of $3750. Assume that a 95% confidence interval estimate of the pop
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