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    1. Incoming telephone calls to a school arrive atrandom times. The average rate will varyaccording to the day of the week. On Mondaymornings, in term time there is a constantaverage rate of 4 per hour. What is theprobability of receiving
    (a) 6 or more calls in a particular hour,
    (b) 3 or fewer calls in a particular period of twohours?
    During term time on Friday afternoons theaverage rate is also constant and it is observedthat the probability of no calls being receivedduring a particular hour is 0.202. What is theaverage rate of calls on Friday afternoons?
    I am stuck on the last part, do you just use the distribution table in the formula booklet.
    Thanks in advance
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    (Original post by -Ahmed-)
    1. Incoming telephone calls to a school arrive atrandom times. The average rate will varyaccording to the day of the week. On Mondaymornings, in term time there is a constantaverage rate of 4 per hour. What is theprobability of receiving
    (a) 6 or more calls in a particular hour,
    (b) 3 or fewer calls in a particular period of twohours?
    During term time on Friday afternoons theaverage rate is also constant and it is observedthat the probability of no calls being receivedduring a particular hour is 0.202. What is theaverage rate of calls on Friday afternoons?
    I am stuck on the last part, do you just use the distribution table in the formula booklet.
    Thanks in advance
    Using the poisson pdf with x=0 should work, no?
 
 
 
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