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Write three R functions: pgumbel, dgumbel, and qgumbel taking three arguments x,location,scale and returning the value (in x) of the distribution function, the density, and the inverse distribution function (the quantile function) respectively for the Gumbel distribution with location and scale parameters given by location and scale.
Persons entering a blood bank are such that 1 in 3 have type O+ blood and 1 in 15 have type O- blood. Consider three randomly selected donors for the blood bank. Let X denote the number of donors with type O+ blood and Y denote the number with typ..
Give a real world example of a situation where normal parametric tests would not be useful and where there is a need for nonparametric test methods. Be specific and explain why nonparametric tests are needed in that case.
Determine the margin of error in estimating the population mean. a sample of 68 college students yields a mean annual income of $3248.
A researcher develops an advertisement aimed at increasing how much the public trusts a federal organization. She asks participants to rate their level.
Assuming normal populations with equal standard deviations, and using the 0.10 level, is there a significant difference between the two routes? Construct and interpret the 90% confidence interval for the difference between the population means.
suppose that the random variable y is an observation from a normal distribution with unknown meannbspmu and variance
Determine the probability of choosing at random license plate which ends in the even number?
Research question : At α = . 01, is degree of certainty independent of credits earned?
The management of a bank in the Caribbean was concerned about the potential loss that might occur in the event of a hurricane. The bank estimated that the loss from one of these storms could be as much as $100 million including losses due to inter..
data was collected consisting of the number of alcoholic drinks students have during the week and their gpa. the data
If the manufacturer sells the parts in packages of 10 parts, what are the mean and standard deviation of the numberof useable parts in a package?
Given the following revenue and cost function for a business firm, calculate the break-even quantity, total revenue, total cost and total profit at break-even level of production.
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