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a company supplies pins in bulk to a customer the company uses an automatic lathe to produce the pins factors such as
1 what is a confidence interval and why is it useful what is a confidence level2 explain why in classical statistics
suppose that you computed a 95 confidence interval for a population meanthe user of the statistics claims your interval
in given problem suppose that a 99 confidence interval is required compute the new interval and compare it with the 95
a car manufacturer wants to estimate the average miles-per-gallon highway rating for a new model from experience with
in given problem do we need to assume that the population of miles-per-gallon values is normally distributed
a wine importer needs to report the average percentage of alcohol in bottles of french wine from experience with
british petroleum has recently been investing in oil fields in the former soviet union before deciding whether to buy
recently three new airlines maxjet lavion and eos began operations selling business or first-class-only service these
according to money the average price of a home in albuquerque is 165000suppose that the reported figure is a sample
a mining company needs to estimate the average amount of copper ore per ton mined a random sample of 50 tons gives a
in given problem what is the probability that the sample mean will be at least 1000 do you need to use the central
in given problem what is the probability that the sample mean will be between 52 and 54problem when sampling is from a
in given problem what is the probability that the sample proportion will be at least 045problemwhen sampling is for a
searches at switzerlands 406 commercial banks turned up only 33 million in accounts belonging to zaires deposed
the proportion of defective microcomputer disks of a certain kind is believed to be anywhere from 006 to 010the
1 explain why we need to draw random samples and how such samples are drawn what are the properties of a simple random
is the sample median a biased estimator of the population mean why do we usually prefer the sample mean to the sample
explain why the sample variance is defined as the sum of squared deviations from the sample mean divided by n - 1 and
residential real estate in new york rents for an average of 44 per square foot for a certain segment of the marketif
in given problem give 095 probability bounds on the value of the sample mean that would be obtained also give 090
according to money the average us government bond fund earned 39 over the 12 months ending in february 2007 assume a
you need to fill in a table of five rows and three columns with numbers all the row totals and column totals are given
thirty-eight percent of all shoppers at a large department store are holders of the stores charge cardif a random
1 when sampling is from a normal population with an unknown variance is the sampling distribution of the sample mean