Changes in demographic outcomes can occur because of changes in within-group rates and/or changes in composition....

Changes in demographic outcomes can occur because of changes in within-group rates and/or changes in composition. First, explain what that sentence means. Then take the example of falling rates of death due to heart disease. How might changes in within-group rates account for that outcome? What about changes in composition? Can you think of any way to sort out the effects of changes in within-group rates vs. changes in composition?

Expert Solution

Changes in a demographic outcomes could occur in 2 ways

1. Change can occur in the the values of exsisting data

2. Change can occur if the data points change ie if some values are dropped and some new values get added to the data

Falling heart rates of death due to heart diesease

Within group

Within group means that people in the group remain the same but the values of the heart rates change for some people

This change of values for some people will be the within group changes

Changes in Composition

Here lets say there are 50 people in a group

Out of the 50 people 10 people leave to another city

So we have only 40 people remaining and it can happen that the heart rate of 50 people was different from the heart rate of the remaning 40 people

To sort out the effects of change in within group rate compared to changes n composition we need to apply ANOVA or the amalysis of variance in the data to find what percent of the change is contributed to within group and between group and a change in compostion

milcah answered 4 months ago

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