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for three independent samples each with n 100 the respective sample proportions are 030 035 and 025 use the 005 level
a scenic america study of billboards found that 70 of the billboards in a sample observed in baltimore advertised
it has been reported that 183 of all us households were heated by electricity in 1980 compared to 265 in 1993 and 307
in applying the chi-square statistic to estimation and tests for a population variance why must the population be
1 a random sample of 30 observations has been drawn from a normal population and the sample variance is found to be
a random sample of 20 observations has been drawn from a normal population and the sample variance is found to be s2
during the early stages of production for a single-cylinder engine designed for use in portable generators the
an instrument maker has randomly selected and submitted 20 of its electronic blood-pressure measurement units to a
according to industry specifications the standard deviation of gasket thicknesses for a given application must be no
in conducting a chi-square test why is it advisable that each expected frequency be at least 50if the expected
in carrying out a chi-square test for the independence of variables what is the procedure for determining the number of
in a test of the independence of two variables one of the variables has two possible categories and the other has three
a researcher has observed 100 shoppers from three different age groups entering a large discount store and noted the
a research organization has collected the following data on household size and telephone ownership for 200 us
researchers in a california community have asked a sample of 175 automobile owners to select their favorite from three
a pharmaceutical firm studying the selection of name brand versus generic equivalent on prescription forms has been
customers of the sky mountain grocery chain are routinely asked at the checkout whether they prefer paper or plastic
upon leaving an assembly area production items are examined and some of them are found to be in need of either further
collecting data for eight games a basketball coach has compiled the following contingency table for the quarter of the
a state law enforcement agency has come up with three different methods for publicizing burglaryprevention measures
interested in comparing the effectiveness of four different driving strategies a government agency has equipped a
a magazine publisher is studying the influence of type style and darkness on the readability of her publication each of
three different heat-treatment methods are being tested against four different zinc-coating techniques with data
three different point-of-purchase displays are being considered for lottery ticket sales at a chain of convenience
1 for what kinds of tests can chi-square analysis be used2 is the chi-square distribution a continuous distribution or