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A communications network has a built-in safeguard system against failures. In this system if line I fails, it is bypassed and line II is used. If line II also fails, it is bypassed and line III is used. The probability of failure of any one of these three lines is .01, and the failures of these lines are independent events. What is the probability that this system of three lines does not completely fail?
What symbol is used to represent the mean of the sampling distribution of y-(ybar)? Explain and what symbol is used to represent one value from the sampling distribution of y-(ybar)? Explain
q1. researchers asked a sample of 50 1st grade teachers and a sample of 50 12th grade teachers how much of their own
brake pads in a car need to be changed on after 7 years on average. the cost is normally distributed as n35050.a. what
question in each of the following statements identify what is wrong.a. the probability that a randomly selected person
De?ne what is meant by a random variable, and give an example
Explain how you can use both T tests in your profession? Restate the research question into a null hypothesis: Does a memory-enhancing drug have an effect on the ability of a group of Alzheimer's patients.
In a recent poll, 126 people were asked if they liked dogs, and 6% said they did. Find the margin of error of this poll, at the 90% confidence level.
According to BusinessWeek, many Japanese consider their cell phones toys rather than tools.14 If a random sample of 200 Japanese cell phone owners reveals that 80 of them consider their device a toy, calculate a 90% con?dence interval for the pop..
when running a non-parametric test on spss with a small sample size which test statistic will not provide the most
suppose that the service life in years of a hearing aid battery is a random variable having a weibull distribution with
mary has a telephone with two lines that allows her to talk with a friend and have at most one other friend on hold. on
What is the probability that of the last 100 new juvenile delinquents put on probation, 30 or more will commit another crime?
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