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We wish to construct a 90% confidence interval on the mean of a population known to be normally distributed based on a sample of 20 observations having a sample mean of 8 and a sample standard deviation of 2. What is the standard error? (Answer to four decimal places.)
When the non-parametric statistics utilized? Write down an example.
Evaluate the significance of the hypothesis that the randomized algorithm has a lower average runtime than the known comparison algorithm. As before, explain and list your calculations, test choices, and conclusion drawn.
Testing equality of two means - difference in performance of the two gasolines and difference in gasoline mileage output
Suppose that 50% of all people are opposed, evaluate probability of getting at least 89% opposed in survey of 1012 randomly selected people.
Test the hypothesis that the dogs did significantly better than what would be expected with random guessing.
If we wanted to shorten the interval of the estimation of the true mean of Saturday sales to a width of $600 in total, what should the size of our sample be to achieve it?
What is the value of the population mean? What is the best estimate of this value?
Can one conclude at a level of significance of .01 that the new ball has improved his game?
Calculate a standard error for the sample mean production rate for the new method and what is the standard error of the $1600 estimate?
A customer from Cavallaro's Fruit Stand picks a sample of 5 oranges at random from a crate containing 80 oranges, of which 6 are rotten. What is the probability that the sample contains 1 or more rotten oranges? (Round your answer to three decimal..
Find out the mean number of letters that will arrive in two days.
Compute the minimum sample size required assuming that no prior information is avaiable?
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