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Unformatted text preview: properties of cdfs (d) What is the probability that the number of pounds of bread sold in a single day will be (i)
more than 300 pounds? (ii) between 150 and 900 pounds?
are the events in (i) and (ii), respectively, are these events independent? " 5. A number is randomly chosen (that is, with uniform distribution) from the interval
is the probability that #
© !¥ and % (e) If . What (a) its ﬁrst decimal digit will be a 1?
(b) its second decimal digit will be a 2?
(c) the ﬁrst decimal digit of its square root will be a 3?
6. Suppose that the duration in minutes of longdistance telephone conversations follows an exponential probability density function !S
$ ¨¦
#"!§¥ !
l
eidv ©S
sUT¥
R Find the probability that the duration of the conversation
(a) will exceed 5 minutes?
(b) will be less than 6 minutes?
(c) will be between 5 and 6 minutes?
(d) will be less than 6 minutes, given that it was greater than 5 minutes?...
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This document was uploaded on 03/01/2014 for the course ECE 109 at UCSD.
 Fall '08
 KennethZeger

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