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Give the equation for the standard deviation of a random variable X over an entire population with probability mass function f(x) and with a known µ
a die is continuously rolled until the total sum of all rolls exceeds 250. what is the probability that at least 70
It is known that the variance of a population equals 484. A random sample of 81 observations is going to be taken from the population. With a .80 probability, what is the sampling error?
What is the estimated index of satisfaction for a person who first married at 18, has an annual income of $26,500, has three children living, has assets of $156,000.
The Oakland Bombers professional basketball team just missed making the playoffs last season and believes it needs to sign only one very good free agent to make the palyoffs next season.
suppose two random variables x and y are independent with x n24 and y n03. w x-y2a. find the distribution of w.b.
The area under a normal curve is always equal to 1, no matter what the mean and standard deviation are.
in a math class college there are 22 students. 17 of these students are forensic science majors and 5 are computer
the prevalence of a health condition is the existing number of cases of that condition in the population. state whether
Assuming that Richard guesses on all eight questions, find the indicated probabilities. What is the probability that he will answer all questions correctly?
if a sample is subdivided into subsamples a minimal sample size of 30 is necessary for every subsample?a. trueb.
Find the value of t α/2 and n = 18 for the 99% confidence interval .B. find the value of t α/2 and n = 15 for the 98% confidence interval.
the american veterinary association claims that the annual cost of medical care for dogs averages 100 with a standard
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