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Bootstrap confidence interval for the median. Your software can generate random numbers that have the uniform distribution on 0 to 1. Figure shows the density curve. Generate a sample of 50 observations from this distribution.
(a) What is the population median? Bootstrap the sample median and describe the bootstrap distribution.
(b) What is the bootstrap standard error? Compute a bootstrap t 95% confidence interval.
(c) Find the BCa or tilting 95% confidence interval. Compare with the interval in (b). Is the bootstrap t interval reliable here?
Twenty times they sold 6 cars, they never sold 7 cars, three times they sold 8 cars and one time they sold 9 cars. Find the probability that at most 4 cars were sold in a week.
total of 203 adults selected at random were cross-classified according to their gender male female and their political
In a suitable one-tail test at the 0.01 level, was the mean age for doctors having the greatest problems with difficult patients significantly less than that for those having the least problems with difficult patients? Identify and interpret the p..
Two popular over-the-counter antacids are compared to determine which brand is preferred. Three hundred subjects are randomly selected then divided into two groups of 150 each, and given one of the two antacids.
The quality-control inspector checks 200 pieces in a certain operation. The piece is either good or defective. The record for nine hours.
The mean time between failures is found to be 322.4 hours for a sample group. assuming that s= 45.0 hours, find the 99% confidence interval for the mean time between failures for all such radios.
Ms Moline is the budget director for Nexus Media Inc. She is comparing travel costs for sales and the audit staff. She collected the following sample data:
a california university is investigating expanding its evening programs. it wants to target people between 25 and 55
consider the hypothesis test given byh0 p 0.5h1 p gt 0.5in a random sample of 225 subjects the sample proportion is
what makes people successful and determine if there are certain population parameters which predict success. since we
Determine the autocorrelation function of the output.- Make a reasonable approximation to obtain a simplified form.
For the growth-oriented funds the mean increase is $1,090 with a standard deviation of $55. At the 0.01 significance level is there a difference in the mean yield of the two funds?
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