Age Dependent Population Models -- TI-92

You may want to consult the usual TI-92 help modules below for this module.

The screen below shows how the Y= screen should be set up for the first example in this module.

Missing TI-92 screen

The screen below shows the first 8 terms of the model.

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It is worthwhile to look at the total population and at the percentage of the total population in each age group. The following home screens define appropriate functions.

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Missing TI-92 screen

It is also worthwhile to keep track of the ratio of the total population in each year to the total population the preceding year. The screen below defines an appropriate function.

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Based on the evidence in the screen below it looks as if the total population over the long term increases by 73% from each year to the next.

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Based on the evidence in the two screens below it looks as if the age distribution stabilzes over the long term with roughly 53% of the\population in their first year; roughly 23% in their second year;roughly 13% in their third year; roughly 7% in their fourth year; and roughly 3% in their fifth year.

Missing TI-92 screen

Missing TI-92 screen


Copyright c 1996 by Frank Wattenberg, Department of Mathematics, Montana State University, Bozeman, MT 59717.