Solution Mid06
1.(a) i. The median salary for one job offer is $10000 and the middle 50% has salaries
between $10000 (first quartile) – $12000 (third quartile) and there are at least
25% (seven) of them has salary 10000. The lowest salary is 8000. There are
two mild outliers, one at 15000 and the other at 18000. Skew to the right.
ii.The median salary for two job offers is $12000 and middle 50% has salary
between $10000 (first quartile) $13000 (third quartile). $10000 is also the
minimum and thus there are five $10000 salaries (
5
10
2
%
25
=
×
×
). There is
one mild outlier at $20000.
(b) Yes, by comparing the medians, interquartile ranges, and adjacent values for 1,
2 and three or more job offers, we see that in general the more job offers one
receives the higher the salary.
2.(a)
The uncertainty before an experiment causes the variation of outcomes after
the experiment. Probability measures the uncertainty before the experiments
and thus it can explain the variation after the experiment.
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 Fall '08
 HU
 job offers, Median salary

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