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If the distribution of the income of US households is approximately normal with the mean = $50k and standard deviation = $20k, determine the approximate probability that in a random sample of 100 US
If the standard deviation of the income of US households is $20k, what would be the sample size which the sampling error (the standard deviation of sampling distribution of the sample mean) is $2k?
Compute the standard error of estimate sy.x Obtain s 95% confidence interval estimate for yc when x=1
Obtain descriptive statistics as well as graphic displays for these salt-taste indices. Do the indices appear to be normally distributed? Why or why not? Compute the sample mean for this index, and
Suggest the following binomial experiment: A company owns 18 copiers. The probability that on a given day any one copier will break down is 9/100. Find the mean number of copiers that will break dow
Suggest the following binomial experiment: A company owns four copiers. The probability that upon a given day any one copier will break down is 0.64. Determine the probability that at least 2 copier
A pair of fair dice is cast. What is the probabiliy that sum of the numbers falling uppermost is 9, given that at least one of the numbers falling uppermost is a 3?
If p = .40, find the expected net profit. Will the owner be willing to take the risk with this probability of success? Determine the smallest value of p for which the owner will take the risk to under
You don't want to have a return under 0.08. Which stock provides you the best chance of returns over 0.08?(suppose returns are normally distributed)
Suggest the following binomial experiment. The probability that the green jelly bean is selected at random from the large package of jelly beans is 2/5. If Sally selects 13 jelly beans, determine th
A probability distribution has mean of 25 and standard deviation of 4. Use Chebychev's inequality to estimate the probability that an outcome of the experiment lies between 11 and 39.
John is interested in purchasing multi-office building containing five offices. The current owner gives the following probability distribution indicating the probability that given number of offices
The probabilities that the blue jar, green jar, or pink jar will be chosen are 1/2, 1/4, and 1/4 respectively. A cookie is then selected at random from the chosen jar. Determine the probability that
Determine the probability that randomly chosen label produced by the company will have a defective compact disk?
A pair of fair dice is cast. Determine the probabiliy that the sum of numbers falling uppermost is 9, given that at least one of numbers falling uppermost is a 3?
Two cards are drawn without replacement from well-shuffled deck of 52 playing cards. Determine the probability that the first card drawn is a Diamond and the second card drawn is not a Diamond?
Suppose that the population standard deviation is known to be 121.8 lb, employ a 0.05 significance level to test the claim that population mean of all such bear weights is greater than 150 lb. Dete
The totals of individual weights of garbage discarded by 62 households in one week have mean of 27.443 lb and standard deviation of 12.458 lb. Employ a 0.05 significance level to test the claim that
Employ a 0.01 significance level to test claim that less than 25% of population thinks that there is not solid evidence that the earth is getting warmer. Determine the test statistic. Is it a t-stat
Assume a computer chip manufacturer rejects 2% of the chips produced because they fail pre-sale testing. Suppose the bad chips are independent. Determine the probability the fifth chip is the first
In other terms, the two points X and Y are independent random variables such that X is uniformly distributed over [0,11) and Y is uniformly distributed over(11,22]. Determine the probability that th
An urn contains 87 balls, of which 21 are blue, 28 are green, and 38 are red. 23 balls are drawn from urn at random and with replacement. Let X,Y , and Z be number of blue, green, and red balls resp
(a) Employ the steps of hypothesis testing. (b) Sketch the distributions involved. (c) Describe your answer to someone who has never taken the course in statistics.
You're going to purchase n cents worth of candy, one piece at atime. Letan be the number of selection sequences that end up costing n cents.Soa2 = 7 ( mm,mb, bb, bm, s, p, g). Order matters. Determ
A small software company will bid on the major contract. It anticipates profit of $50,000 if it gets it, but thinks there is only 30% chance of that happening. Determine the expected profit?