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Discrete or continuous. In each of the following situations decide if the random variable is discrete or continuous and give a reason for your answer.
(a) Your Web page has five different links, and a user can click on one of the links or can leave the page. You record the length of time that a user spends on the Web page before clicking one of the links or leaving the page.
(b) The number of hits on your Web page.
(c) The yearly income of a visitor to your Web page.
Determine the mean, median, and standard deviation. Determine the first and third quartiles. Develop a box plot. Are there any outliers? Organize the distribution of funds into a frequency distribution.
It is estimated that the competitor will submit a bid for the contract with probability 0.40. What is the probability of getting the deal?
The n =10 patients had a mean decrease in IOP of = 15.2 mm Hg with a standard deviation of the 10 IOPs equal to s = 9.8 mm Hg after 15 weeks of using the drug. Determine the appropriate sample size for an a α = .01 test to have at most a .10 pr..
a student suspected claim the average cost of a sturday night date was no longer 30. to test her hypothesis she
Explain what is meant by ‘double-blind, randomised, placebo controlled trial' in the context of the study - Explain what is meant by ‘Randomisation was stratified by gender'. Why might the researchers in this study decide to ‘stratify by gender'?
a biologist wants to test the null hypothesis that the mean mean wingspan of a certain kind of insect is 12.3mm against
Determine how large a sample would be necessary to estimate the population proportion with a margin of error of .05 at 95% confidence
a bridge culvert is designed to pass a stream discharge with an annual exceedance probability of 0.02 without
Create the 95% confidence interval for portion of respondents who feel president is doing a good job. Based on the intervalin part(a), It is sensible to conclude that majority.
The shirt was a mesh polo shirt. Given this information, what is ths probability that the mesh polo shirt came from box 1?
suppose the following data are selected randomly from a population of normally distributed values.44 51 43 48 45 57 54
You take a sample of 22 from a population of test scores, and the mean of yoursample is 60. (a) You know the standard deviation of the population is 10.What is the 99% confidence interval on the population mean.
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