A group of college students believes the average grades in psychology courses are different than the average grades in biology courses. The group found the average
Psychology grades of a sample of 11 students was 82.4 and the average biology grades of
A sample of 11 students was 81.2. What is the null hypothesis for this study?
A) $H _ { 0 } : \mu _ { \text {psychology } } = \mu _ { \text {biology } }$
B) $H _ { 0 } : \mu _ { \text {psychology } } + \mu _ { \text {biology } } = 163.6$
C) $H _ { 0 } : \mu = 82.4$ and $81.2$
D) $H _ { 0 } : \mu _ { \text {psychology } } = 82.4$ and $H _ { 0 } : \mu _ { \text {biology } } = 81.2$

Question

A group of college students believes the average grades in psychology courses are different than the average grades in biology courses. The group found the average
Psychology grades of a sample of 11 students was 82.4 and the average biology grades of
A sample of 11 students was 81.2. What is the null hypothesis for this study? 
A) $H _ { 0 } : \mu _ { \text {psychology } } = \mu _ { \text {biology } }$
B) $H _ { 0 } : \mu _ { \text {psychology } } + \mu _ { \text {biology } } = 163.6$
C) $H _ { 0 } : \mu = 82.4$ and $81.2$
D) $H _ { 0 } : \mu _ { \text {psychology } } = 82.4$ and $H _ { 0 } : \mu _ { \text {biology } } = 81.2$

Quizplus · Accepted Answer

The null hypothesis typically states that there is no difference or no effect. In this case, it states that the average (mean) grades in psychology courses are equal to the average grades in biology courses.

A Group of College Students Believes the Average Grades in Psychology