A researcher conducted a survey to determine if older people have different feelings about abortion than younger people. He used an alpha level of 0.05 (Z critical =±1.96) to test for significance and found that his computed test statistic was 2.76. Which of the following conclusions is justified?________.
A) Feelings about abortion do not vary by age.
B) Older and younger people have significantly different feelings about abortion.
C) A one-tailed test should have been used.
D) A Type II error has occurred.

Question

Quizplus · Accepted Answer

The computed test statistic (2.76) is greater than the Z critical value (±1.96) at the alpha level of 0.05, which means the results are statistically significant. Therefore, we reject the null hypothesis and conclude that older and younger people have significantly different feelings about abortion. Option A is incorrect as the result shows a significant difference between the two groups. Option C is incorrect as there is no indication that a one-tailed test was necessary. Option D is not applicable as a Type II error occurs when a true null hypothesis is not rejected, which is not the case here.

A Researcher Conducted a Survey to Determine If Older People