Barbara Ferguson wants to examine intelligence in adolescents from lower-, middl

Question

Barbara Ferguson wants to examine intelligence in adolescents from lower-, middle-, and upper-income households. She wants to know if similar levels of intelligence are found in youth from all three income groups. 100 youth are selected from each income group. What is the null hypothesis? Select one: a. In the sample, the three groups have equal levels of intelligence, on average. o b. In the population, the three groups have different levels of intelligence, on average.X c. In the sample, the three groups have different levels of intelligence, on average d. In the population, the three groups have equal levels of intelligence, on average.

Explanation / Answer

d) In the Population, the three groups have equal levels of intelligence, on average.

Since we draw an inference about the population parameters from the sample.

Therefore we test the null hypothesis regarding population.

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