A waiterwaiter believes the distribution of hishis tips has a model that is slightly skewed to...
A
waiterwaiter
believes the distribution of
hishis
tips has a model that is slightly skewed to the
leftleft,
with a mean of
$9.19.10
and a standard deviation of
$5.15.10.
HeHe
usually waits on about
6060
parties over a weekend of work.
a) Estimate the probability that
hehe
will earn at least
$550550.
b) How much does
hehe
earn on the best
55%
of such weekends?
Homework Answers
a) P(At least $550)
= P(Mean at least 550/60)
= P(Mean at least 9.17)
= P(z > 0.11)
= 0.4577
b) z score for top 5% area = 1.645
Hence,
Earnings = 9.10 + 1.645*5.1 = 17.49
Add Answer to:
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