A researcher assigns 21 adolescents to rate the likability of a person described in a vignette as having one of three personality traits.An equal number of participants are assigned to each group.If = 4.08 for this study,then what was the decision at a .05 level of significance for a one-way between-subjects ANOVA?
A)Reject the null hypothesis.
B)Retain the null hypothesis.
C)There is not enough information to answer this question.

Question

A researcher assigns 21 adolescents to rate the likability of a person described in a vignette as having one of three personality traits.An equal number of participants are assigned to each group.If  = 4.08 for this study,then what was the decision at a .05 level of significance for a one-way between-subjects ANOVA?
A)Reject the null hypothesis. 
B)Retain the null hypothesis. 
C)There is not enough information to answer this question.

Quizplus · Accepted Answer

The fact that the researcher calculated the F-value and provided the degrees of freedom (11 and 9) suggests that the null hypothesis was an assumption in this study. Given that the level of significance is .05 and that the F-value is significant, the most appropriate decision would be to reject the null hypothesis and conclude that there is a statistically significant difference among the three personality traits.

A Researcher Assigns 21 Adolescents to Rate the Likability of a Person