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Chapter14
Exercise 1.
Label columns ‘IAT’, inter-arrival time; ‘AT’,
arrival time; ‘ATX’, AT-0.5; ‘AI’, arrival interval;
‘AIL’, list of arrival intervals; ‘N’, no. in
arrival interval.
RANDOM 500 ‘IAT’;
EXPONENTIAL 0.5.
PARSUMS ‘IAT’ ‘AT’
LET ‘ATX’ = ‘AT’ – 0.5
ROUND (‘ATX’, ‘AI’)
TALLY ‘AI’;
STORE ‘AIL’ ‘N’.
# The values of N opposite 5, 10, 15,…are observations from the
required distribution. Ingenuity or hard labour is needed to pull them
out. Do not overlook zero counts. If an arrival interval, e.g. 35, includes
no cars, it does not enter the list.
Exercise 2.
# Label columns X, Y, Z.
RANDOM 500 ‘X’;
UNIFORM 0 1.
RANDOM 500 ‘Y’;
UNIFORM 0 2.
LET ‘Z’ = ‘X’ + ‘Y’
