Question 1
The results of a Tukey multiple comparison are summarized below.
| a. | How many pairwise comparisons of the three treatments are there? |
b.
Which treatments are significantly different from each other?
c.
Which treatments are not significantly different from each other?
Question 2
An experiment was conducted to compare the mean iron content in iron ore pieces determined by three different methods: (1) mechanical, (2) manual, and (3) laser. Five 1-meter long pieces of iron ore were removed from a conveyor belt, and the iron content of each piece was determined using each of the three methods. The data are shown below. How should the data be analyzed?
◦ completely randomized design with three treatments
◦ randomized block design with three treatments and five blocks
◦ randomized block design with five treatments and three blocks
◦ 3 × 5 factorial design
iron
Example of pre- and posttest Interpretation in an Experiment
Rosenthal and Fode’s Rat Experiment
Redi Experiment
The Taylor–Woods–Hughes experiment
Davis’s U-tube experiment