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Public Health and Nutrition Emergency defibrillators are now located in many public buildings. However, the U.S. Food and Drug Administration (FDA) is concerned about the reliability of these devices. Approximately 45,000 devices failed during the past seven years.41 Suppose the FDA claims that the probability of an emergency defibrillator working correctly is 0.90, and 30 of these devices are selected at random and tested.a. Find the probability that exactly 28 devices will work correctly.b. Find the probability that at least 25 devices will work correctly.c. Suppose only 20 of the devices work correctly. Is there any evidence to suggest that the proportion of emergency defibrillators that work correctly has changed? Justify your answer.
Suppose that a town asks the circus to come, but the only available site in town holds a maximum of 8000 people.
Determine the probability that subscriber didn't rent the car during past 12 months for either business or personal reasons?
Construct a 99% confidence interval estimate of the total value of the beds in stock at the end of the month if there were 258 beds in stock.
1. in exponential smoothing if the smoothing constant alpha is 1 you will get the same forecast as obtainable using the
question 1 the manager of a famous food outlet conducted a survey and took a sample of 13 customersrsquo spending at
Since it is desirable to amplify the 1000-Hz component in the process, arrange to provide an overall gain of 100 as well. The op amps available are ideal except that their output voltage swing is limited to ±10 V.
Suppose two drivers are selected at random. What is the probability that both are paid $1000?- Suppose two drivers are selected at random. What is the probability that at least one is paid $500 or more?
in a sample of children given a new flu vaccine a large number of the children develop a neurological disease. parents
A regression of attitude toward legalizing marijuana on age (X1) and education (X2) produced the following estimated coefficients and standard errors for a sample of 265 persons.
Draw the suitable distribution, and locate critical regions for α = .05. Compute test statistics (z score) for the sample.
(a) Explain under what conditions we would commit a type I error and under what conditions we would commit a type II error.
A car insurance compancy has recorded the number of claims for the past quarter by age and gender. The information is recorded below.
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