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an engineer believes it takes an average of 150 man-hours to assemble a portion of an automobile as a check the time to
for a study on self-awareness the observed values for one of the groups
rats are subjected to a drug that might affect aggression suppose that for a random sample of rats measures of
1 suppose m 34 and the mckean-schrader estimate of the standard error of m is sm 3 compute a 95 confidence interval
a cosmetic company found that 180 of 1000 randomly selected women in new york city have seen the companys latest
listed here are the average lsat scores for the 1973 entering classes of 15 american law schools545 555 558 572 575 576
given that xoline 78 sigma2 25 n 10 and alpha 05 test h0 mu gt 80 assuming observations are randomly sampled from
1 for a binomial with n 20 and p 7 determine the mean and variance of pcirc the proportion of observed successes2 for
1 a coin is rigged so that when it is flipped the probability of a head is 7 if the coin is flipped three times which
the department of agriculture of the united states reports that 75 of all people who invest in the futures market lose
imagine you are a health professional interested in the effects of medication on the diastolic blood pressure of adult
many research teams intend to conduct a study regarding the proportion of people who have colon cancerif a random
1 if a distribution appears to be bell-shaped and symmetric about its mean can we assume that the probability of being
1 can small changes in the tails of a distribution result in large changes in the population mean mu relative to
1 if the cholesterol levels of adults are normally distributed with mean 230 and standard deviation 25 what is the
suppose the daily amount of solar radiation in los angeles is normally distributed with mean 450 calories and standard
a large computer company claims that their salaries are normally distributed with mean 50000 and standard deviation
1 assume that the income of pediatricians is normally distributed with mean mu 100000 and standard deviation sigma
a manufacturer of car batteries claims that the life of their batteries is normally distributed with mean mu 58 months
a machine to measure the bounce of a ball is used on 45 randomly selected tennis balls experience has shown that the
the weight of trout sold at a trout farm has a standard deviation of 25based on a sample of 10 trout the average weight
the length of a bolt made by a machine parts company is a normal random variable with standard deviation sigma equal to
1 for the following situations a n 12 sigma 22 x 65 b n 22 sigma 10 x 185 c n 50 sigma 30 xmacr 19 compute a
for the values 2 3 5 6 8 12 14 18 19 22 201 why would you suspect that the mckean-schrader estimate of the standard
1 summarize when it would and would not be reasonable to assume that the sampling distribution of m is normal2 for the