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a man has four cars for hire the average demand on a weekday is for two cars assuming 312 weekdays per year obtain the
the number of accidents per day on a particular stretch of motorway follows a poisson distribution with a mean of one
a quality control system selects a sample of three items from a production line if one or more is defective a second
a local newspaper has conducted a telephone survey in a neighbourhood with 900 dwellings and discovered that 60 per
the credit manager of a company knows from past experience that if the company accepts a good risk applicant for a
you are considering putting money into one of two investments a and b the net profits for identical periods and
which discrete probability distribution would be used for the following random variablesi the number of goals scored
mini case 102examples of events that can be modelled as poisson distributions include the number of deaths by horse
mini case 101here are three examples ofnbsppeople using the binomial in very different contexts in the first case the
the service manager of a garage wishes to determine the cost labour plus parts of performing a standard car service on
electrical resistors have a design resistance of 500 ohms the resistors are produced by a machine with an output that
the lifetimes of certain types of car battery are normally distributed with a mean of 348 days and standard deviation
mini case 111we have said that thingsnbspwhich are affected by numerous factors often have a normal distribution and
the development engineer of a company making razors has been asked by the marketing department to compare the shaving
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