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a sample of 120 housewives was randomly selected from those reading a particular magazine and 18 were found to have
a sample of 75 packets of cereals was randomly selected from the production process and found to have a mean of 500g
in a survey of 1000 electors 20 per cent were found to favour party xa construct a 95 per cent confidence interval for
a survey of 50 home buyers with mortgage arrears revealed that the average level of arrears was pound1796 produce a 95
it has been claimed that only 45 per cent of customers find changes to an invoicing system an improvement assuming this
it has been estimated that the average weekly wage in a particular industry is pound172 and that the standard deviation
a random sample of eight business transactions was selected from a large number of such transactions the degrees of
a first year undergraduate module was developed with an assignment that could be in two different modes of
mini case 121the importance of intuition is generally accepted intuition can give insight and a sense of new direction
a sample of ten job applicants were asked to complete a mathematics test the average time taken was 28 minutes and the
a company tech train specializes in developing and conducting training courses in using business software the courses
a country estate has two lakes stocked with rainbow trout that are open to the public for commercial fishing they claim
when introducing new products to the market place a particular company has a policy that a minimum of 40 per cent of
a photocopying machine produces copies 18 per cent of which are faulty the supplier of the machine claims that by using
a machine is designed to produce rope with a breaking strain of 1000 n a random sample of 36 pieces of rope had a mean
the management of a company claim that the average weekly earnings including overtime payments of their employees is
a television has an advertized life of 30 000 hours a random sample of 50 sets had an average life of 28 500 hours with
the mean wage of people living in a block of flats is said to be pound400 a week a random sample of 36 people was
given h0nbsppinbsp1nbsp- pinbsp2 0 and h1nbsppinbsp1nbsp- pinbsp2 lt 0 wheregtpi is a percentage we are testinga a
the marketing department claims that 60 per cent of customers are aware of the full range of the products offered by
a car manufacturer introduced an updated version of one of the firms models which would run on either diesel or petrol
when testing hypotheses about the mean the appropriate significance test may be a z-test or a t-test in general when is
mini case 132the use of language is important numbers provide understanding and insight they are collected and
mini case 131this may seem a verynbspobvious statement but problem understanding does require challenging provocative
a wine merchant receives regular shipments of cases of wine from new zealand and records if any particular shipment was