Exhibit 19-1

Multiple Choice

Exhibit 19-1.A researcher wished to determine if there was a difference in the college aptitude examination scores of traditional and nontraditional undergraduate students.The researcher selected p = .05 as the level for rejecting the null hypothesis.The researcher obtained a mean score of 52 for nontraditional students and a mean score of 40 for the traditional students.Statistical analysis indicated that the difference in means was significant at the .05 level.
-Refer to Exhibit 19-1.The null hypothesis for this study would be

A) nontraditional college students will score higher on a college aptitude test than will traditional college students.
B) traditional college students will score higher on a college aptitude test than will nontraditional college students.
C) the age of students will have a significant effect on their performance on a college aptitude test.
D) there is no significant difference in the performance of traditional and nontraditional college students on a college aptitude examination.