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Find the 40 th percentile of the following random variables:
a. The amount of concrete in stock at a supply store, which is Uniform from 10 tons to 40 tons.
b. The length of a comedy movie, which is Normal with μ=100 minutes and σ = 16 minutes.
c. The waiting time until a major oil spill, which is Exponential with μ=3 years.
For cause 3, 60% of the failures in any year occur 1/4 of the way through the year and the other 40% occur 3/4 of the way through the year. Find formulas that give the unprimed rates in terms of the primed.
An express delivery service company recently conducted a study to investigate the relationship between the cost of shipping a package (Y), the package
NEGATIVE BINOMIAL DISTRIBUTION A random variable X has a negative binomial distribution and it is referred to as a negative binomial random variable if and only if
For a given sample size, the standard error of the sample mean is 10 grams. With other factors unchanged, to what extent must the sample size be increased if the standard error of the sample mean is to be just 5 grams?
one marble is drawn at a time without replacement from an urn that initially contains 6 white and 4 black marbles. find
consider acid rain that was measured to have a ph of 2.5. how many times more acid is this acid rain than typical rain
Subsequent questions concern other political, social, and election issues. Explain why this question order might be the best order for estimating how people may vote in the presidential election.
Assume that samples of size 2 are randomly selected with replacement from this population of four values. The first samples selected is 11,9. What is the mean of the sampling distribution of means?
Assume normality and conduct the appropriate hypothesis test to determine whether the population mean cost of a private room is $15 greater.
a population is normal with a variance of 17. suppose you wish to estimate the population mean u. find the sample size
Compare AND contrast the three measures of central tendency: mean, median and mode. Is there a "best" measure of central tendency?
Median score of 67. Based on this information, the distribution of test scores is symmetric, left skewed, right skewed, or bimodal?
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