Welke verdeling te gebruiken?
Geplaatst: 02 dec 2013, 22:39
Hallo,
Kan iemand mij uitleggen welke verdeling(Binomial, Geometric, Poisson) ik moet gebruiken bij a, b en c?
Ook graag een toelichting waarom.
a A travelling salesman sells his encyclopaedia’s, on average, to 15% of the selected clients.
One day he visits 12 of these clients.
Let X be the number of clients to whom he sells an encyclopaedia.
b In the hospital of the region two incubators (for babies) are available. According to the hospital
the mean demand for incubators per day during the last two years was 1.5 per day.
X is the demand for incubators, that is the number of babies that need an incubator, on an
arbitrary day.
c. Mary is asked to go out tonight, but she needs a babysitter for her daughter. She has a (very
long) list of friends she can ask to be the baby sitter. She assumes that a friend will agree to be
the baby sitter on this short notice at a probability rate of 20%.
Define X = “the number of friends she has to contact before she finds a babysitter”.
Kan iemand mij uitleggen welke verdeling(Binomial, Geometric, Poisson) ik moet gebruiken bij a, b en c?
Ook graag een toelichting waarom.
a A travelling salesman sells his encyclopaedia’s, on average, to 15% of the selected clients.
One day he visits 12 of these clients.
Let X be the number of clients to whom he sells an encyclopaedia.
b In the hospital of the region two incubators (for babies) are available. According to the hospital
the mean demand for incubators per day during the last two years was 1.5 per day.
X is the demand for incubators, that is the number of babies that need an incubator, on an
arbitrary day.
c. Mary is asked to go out tonight, but she needs a babysitter for her daughter. She has a (very
long) list of friends she can ask to be the baby sitter. She assumes that a friend will agree to be
the baby sitter on this short notice at a probability rate of 20%.
Define X = “the number of friends she has to contact before she finds a babysitter”.