Comparing Two Independent Population Proportions · Example 3
A marketing firm claims that the proportion of younger adults who own electric vehicles is greater than the proportion of older adults who own electric vehicles. A random sample of U.S. adults was taken, and the results of the survey indicate the following:
• Out of a sample of 232 older adults (aged 35 or older), 5% own electric vehicles.
• Out of a sample of 1,343 young adults (aged 34 or younger), 10% own electric vehicles.
Test at the 5% level of significance. Is the proportion of younger adults greater than the proportion of older adults with respect to owning electric vehicles?
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Introductory Statistics 2e · §10.3 Comparing Two Independent Population Proportions · Example 3
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