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A company which manufactures computer disks has a good reputation for the reliability of the disks that it produces. It is known that only 1 per cent of the disks which are manufactured by this company are faulty.The disks are packed in boxes of 500.
a)i) Write down the probability distribution for X, the number of faulty disks in a box of 500 disks.
ii ) Calculate the probability that there is exactly one faulty disk in a randomly selected box of 500 disks.
b) Find values for the mean and variance of X.
c) Using a distribution approximation, calculate the probability that there are more than 10 faulty disks in a box of 500 disks.
Construct a 95% confidence interval for the population mean, μ. assume the population has a normal distribution. In a random sample of 26 computers.
Two boats the prada (Italy) and the oracle (USA) are competing for a spot in the upcoming Americans cup race. They race over a part of the course several times. Below are the sample times in minutes at the .05 significance level.
The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, an average U.S. driver takes 50,000 trips. (a) What is the probability of a fatal accident over a lifetime? Explain your rea..
For each of the following hypotheses, decide whether a one-tailed or two-tailed test would be performed: Children with birth defects will score differently than the normal population on a measure of self-esteem.
Given the following sample information, test the hypothesis that the treatment means are equal at the .05 significance level. Complete an ANOVA table. State your decision regarding the null hypothesis.
To findout the point estimate of the difference among population mean. Elucidate the percentage increase in the number of days on the disabled list.
A committe studying employer-employee relations proposed that a rating system be adopted. Each employee would rate his or her inmediate supervisor and in turn the supervisor would rate each employee.
Compare two month moving average also exponential smoothing using MAD. The subsiquent data represents demand for company ABC's products for the last 10 months.
brief discussion telling why you chose this particular data set to study. As in discussion two, I am hoping that you will choose data that has some relevance to your life.
I'm trying to determine what happens to the sample size if the level of confidence is reduced from 95% to 90% but the allowable error and the standard deviation remain
Sample of newspaper readers was asked to report which newspaper they read and to point to whether they were blue-collar worker, white-collar workerNewspaper reader is selected at random. Determine the probability that person selected.
The margin of error for a 95% confidence interval estimate for the proportion of all students with cell phones is
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