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In a survey to estimate the abundance of a rare animal species in a study region divided into N = 1000 units, an initial simple random sample of n = 100 units is selected. An adaptive cluster sampling design is used with adjacent units added to the sample whenever one or more of the animals is encountered. One of the units in the initial sample intersected a network of two units containing three of the animals, and another intersected a network of three units containing six animals. The other 98 units of the initial sample contained none of the animals. Estimate the total number of the animals in the population using draw-by-draw intersection probabilities and estimate the variance of the estimator.
in a group lineup of 7 models in a commercial 3 are male and 4 are female. in how many ways can you arrange 3 models in
The students of Hugh Logan's math class took the Scholastic Aptitude Test. Their math scores are shown below. Find the mean score
the average tenure of technicians at abc company is 10 years with a standard deviation of 5 years. calculate the
A supermarket advertises that the waiting time spend by customers waiting in line at the cash register is uniform between 0 and 6 minutes.
a company has observed that there is a linear relationship between indirect labor expense ile in dollars and direct
Compute the Expected Value (Mean), The Variance, and The Standard Deviation for this random variable. X 1 2 3 4 5 6 7
Formulate the null and alternative hypothesis for this management question (i.e. can the financial analyst conclude that there is no difference in the average earnings yield between companies in the manufacturing and retailing sectors?)
If the mean number of serious accidents per year in a large factory (where the number of employees remains constant) is five, find the probability that in the current year there will be:
suppose you decide to take a sample of size 2 n2 by rolling a die twice. produce a histogram representing the sampling
About 95% are between 500 +- 200; i.e. between 300 and 700 Where is the data located? Where is the "middle" of the data? How variable are the data? How spread out about the "middle" are the data?
A presidential candidate's aide estimates that, among all college students, the proportion p who intend to vote in the upcoming election is at least 70%.
let x and y be independent random variables with x exp2 and yexp3 where the pdf of an exponential random variable is
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