Decide which test should be used to test the the null hypothesis in each of the following experiment.
1. In class survey, students were asked, "Regarding your weight, do you think you are: About right? Overweight? Underweight?". The researcher wants to know whether males and females differ in their perception of weight.
2. To determine whether the construction of a road through a National Park had an effect on water quality in a nearby creek, the turbidity of the creek water was measured at 12 randomly selected points along the creek before the road construction began and again at the same 12 points one year later, after the road had been built.
3. Students in an introductory statistics class participated in a simple experiment. The students took their own pulse rate (Pulse 1). They were then split into three groups. The students in Group 1 ran on the spot for one minute, those in Group 2 sat for one minute, and those in Group 3 walked for one minute. At the end of the one minute all students took their pulse again (Pulse 2). The difference between Pulse 1 and Pulse 2 for each group was calculated.
4. A cross was made between green and yellow pea. The plant geneticist wanted to know whether the colour segregation in this cross followed the Mendelian segregation with the expected ratio of 9:3:1.
A. One-sample t-test
B. Paired t-test
C. Two-sample t-test
D. Chi-square
E. Regression
F. ANOVA
G. Correlation
