Question: Refer to Exercise, where the statistics practitioner estimated the size of market segments based on education among California adults. Suppose that census figures from 10

Refer to Exercise, where the statistics practitioner estimated the size of market segments based on education among California adults. Suppose that census figures from 10 years ago showed the education levels and the proportions of California adults, as follows:

LEVELPROPORATION

1. Did not complete high school ...........23

2. Completed high school only .............40

3. Some college or university ............15

4. College or university graduate ............22

Determine whether there has been a change in these proportions.

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