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According to a study conducted by Dell Computers, 65% of men and 70% of women say that weight is a very important factor in purchasing a laptop computer. Suppose this survey was conducted using 374 men and 481 women. Do these data show enough evidence to support the conclusion that there is no difference in the proportion of men and women who think weight is a factor in purchasing a laptop? Use a 5% level of significance.
Estimate the probability that a randomly selected jar will have a fill, x, that is out of specification. Assume that the process is in control and that the population of all jar fills is normally distributed.
eBay selling prices: For eBay auctions of the iPad2 64GB 3G Wi-Fi units, a sample was taken in July 2011 where the Buy-it-Now prices were (in dollars): Find the standard deviation of the data and the standard error of the sample mean, Interpret
Find the area of the indicated region under the standard normal curve.
The useful life of an electrical component is exponentially distributed with a mean of 2500 hours. a. What is the probability the circuit will last more than 3,000 hours.
Express Var(X) in terms of p, E(N), and Var(N), by using the law of total variance.
In this problem, we develop a weak law of large numbers for a correlated sequence X1, X2,... of identical random variables. In particular, each Xi has expected value E[Xi] = µ, and the random sequence has covariance function
suppose telephone calls arrive at an emergency hotline at a rate of 5 per hour and you begin monitoring calls at time
the probability density function of the net weight in pounds of a packaged chemical herbicide is fx 2.0 for 49.75 lt
If an auditor takes a random sample of 36 accounts what is the probability that the mean balance will be less than 45?
about 3 of the population has a particular genetic mutation. 500 people are randomly selected.find the mean for the
tudent from the high school is arbitarily selected. Reply the following questions: Determine the probability that the student's ACT score is less than 22?
1) Use technology and a t-test to test the claim about the population mean mu(u) at the given level of significance alpha using the given sample statistics. Assume the population is normally distributed.Claim: mu(u)>76; alpha=0.05, Sample statisti..
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