Question: A medical researcher wishes to test the effects of 2 diets and the time of day on the sodium level in person’s blood. Eight people are randomly selected, and two are randomly assigned to each of the four groups. Analyze the data shown in the tables here, using a two-way ANOVA at a=0.05. The sodium content is measured in milliequivalents per liter.

Diet Type I II

Time

8:00 am 135 145 138 141

8:00 PM 155 162 171 191