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At a computer manufacturing company, the actual size of computer chips is normally distributed with a mean of 1 centimeter and a standard deviation of 0.1 centimeter. A random sample of 12 computer chips is taken. what is the standard error for the sample mean?
Let the random variable X represent the number of defective DVD players among 200 randomly selected DVDs of this type. Does the random variable X have a binomial distribution or a Poisson distribution?
Use a .05 significance level to test claims that quarters manufactured with the new equipment have weights with a standard deviation less than .061
A researcher conductued a study of the access speed of 35 hard drives and concluded that his maximum error of estimate was 35. If he were to conduct a second study to reduce the maximum error of estimate to 7, about how many hard drives should he ..
A precision parts manufacturer produces bolts for use in military aircraft. The specifications for bolt length are 37.50 ± 0.25 cm. The company has established an -chart and an R-chart using samples of size five.
The manager fo the Petroco Service Station wants to forecast the demand for unleaded gasoline next month so that the proper number of gallons can be ordered from the distributor. Compute the two forecast by using MAPD and indicate which seems to be..
How many departments would they need to survey to achieve this level of accuracy with 95% confidence?
If one investment can give you $1200 with a probability of .20 and you could lose $800 with a probability of .80, and another investment can give you $600 with a probability of .70 and a loss of $300 with a probability of .30, which investment is ..
A step by step solution is included to explain the concept of finding taylor series expansion of a given polynomial of degree 4 at a given ponit. The same concept can be applied to find the taylor series expansion of other polynomials and function..
Explain how one extreme score influences mean and standard deviation.
Which component of a time series is most likely to occur? Which component has a pattern that must be complete in a single year and repeat from year to year?
A population is Normally distributed and has a σ =24. Samples of size 25 have a sample mean of 100. Find the 90% confidence interval for the population mean.
Find the minimum sample size required for estimating the overall proportion of students who passed Exam P in 2009 to within 4% with 95% confidence if it is known that this proportion is between 30% and 40%.
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