Statistics: Hypothesis tests: Z-test – #26126


Question: 58 In 2000, 8.6% of all U.S. families had incomes below the poverty level, as reported by the U.S. Census Bureau in Current Population Reports. During that same year, of 400 randomly selected families whose householder had at least a Bachelor’s degree, 9 had incomes below the poverty level. Does the data provide the sufficient evidence to conclude that, in 2000, the percentage of families that earned incomes below the poverty level was lower among those whose householders had at least a Bachelor’s degree than among all U.S. Families? Use .

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