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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
an environmental protection agency wishes to investigate the effectiveness of the environment awareness weekend courses
attitudes to green issues can be characterized into conservative and radical during the building of a new airport the
an organization has two cars both the same modelnbsp that are used by their two sales staff on balance both travel
on a portion of the m4 motorway all four lanes in each direction become congested during peak time weekday periods a
hiho ltd specializes in guided walking holidays based around its own holiday hotels in the uk the company provides two
a factory employs three quality control inspectors they are asked to keep a record of the number of items they test and
you are using the mann-whitney u test for a large sample and have been given the following statistics t 258 n1 15 and
you are using the mann-whitney u test for a small sample and have been given the following summaryusing a 5 per cent
a frequency table has been used to report the length of life of a component the table has eight intervals and has been
mini case 141the use of significance testingnbspis an important part of the research process it provides a rigorous way
a company is using a system of payment by results the union claims that this seriously discriminates against newer