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shimano mountain bikes are displayed in chic clothing boutiques in milan italy and the average price for the bike in
a quality-control analyst wants to estimate the proportion of imperfect jeans in a large warehouse the analyst plans to
suppose that you have two statistics a and b as possible estimators of the same population parameterestimator a is
suppose that you have an estimator with a relatively large bias the estimator is consistent and efficient howeverif you
suppose that in a sampling survey to estimate the population variance the biased estimator with n instead of n - 1 in
1 what are the advantages of a sufficient statistic can you think of a possible disadvantage of sufficiency2 why is
suppose that you have two biased estimators of the same population parameter estimator a has a bias equal to 1n that is
three random samples of sizes 30 48 and 32 respectively are collected and the three sample means are computedwhat is
the data points in a sample of size 9 are 34 51 40 38 47 50 52 44 37a if you can take the deviations of these data from
your bank sends you a summary statement giving the average amount of all checks you wrote during the month you have a
in given problem suppose you know the amounts of 18 of the 19 checks you wrote and the average of all the checks can
you are allowed to take the deviations of the data points in a sample of size n from k numbers you select in order to
suppose you are sampling from a population with mean micro 1065 and standard deviation sigma 500 the sample size is n
suppose you are sampling from a population with population variance sigma2 1000000 you want the standard deviation of
when sampling is from a population with mean 53 and standard deviation 10 using a sample of size 400 what are the
when sampling is for a population proportion from a population with actual proportion p 05 using a sample of size n
what are the expected value and the standard deviation of the sample proportion p if the true population proportion is
for a fixed sample size what is the value of the true population proportion p that maximizes the variance of the sample
it has been suggested that an investment portfolio selected randomly by throwing darts at the stock market page of the
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a study of the investment industry claims that 58 of all mutual funds outperformed the stock market as a whole last
when sampling is done for the proportion of defective items in a large shipment where the population proportion is 018
an economist wishes to estimate the average family income in a certain populationthe population standard deviation is
according to money in the year prior to march 2007 the average return for firms of the sampp 500 was 1319 assume that
the colosseum once the most popular monument in rome dates from about ad 70 since then earthquakes have caused