MA118 Laboratory Project 2
Modeling union membership
A mathematical model is a mathematical object (often a function or equation) which is used to
represent and predict realworld data.
In this lab, you're going to look at a mathematical model your
text proposes for union membership data from 1920 through 1996, and look at how well it
represents two things:
the actual percent of union membership, and the
changes
in that
percentage.
(Very often, one is more interested in how such an index is changing than in its
individual values.)
The function your text proposes as a model for the percent of workers in unions
for the years 1920 through 1996 is
f(t) = 0.0003869*t^3  0.08917*t^2 + 6.2503*t  105.9
where t is the number of years since 1900
.
(Thus, f(75) represents the model's value of the percent
of workers in unions in 1975.)
Your lab will have 4 parts:
1. Enter the function above (you can simply use the copy, paste option, starting with the equals
sign, after you've inserted
the name
t
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 Spring '08
 hara
 Math, Derivative, Trade union, Laboratory Project 2 Modeling union, Frank Camarda

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