True and false question If false explain why? 8. You go to the doctor today to t

Question

True and false question If false explain why? 8. You go to the doctor today to test if you have diabetes. The fasting blood sugar level for someone with diabetes is >126mg/dL. The result of your test is that your fasting blood sugar level is 125mg/dL so the doctor claims you do not have diabetes. You do not have diabetes. (the null hypothesis is that you have diabetes) 9. A vet wants to compare 3 different diets on piglets' weight gain. The vet chooses 10 litters that each has at least four healthy, similarly sized piglets that have just been weaned. In each litter, four piglets are selected and one treatment is randomly assigned to each piglet. Diets are labeled A, B or C. This is an example of a Completely Randomized Design. 10. If we are using a QQ-plot to assess the assumption of normality, we check to see if the points are on the 45-degree line. If this is true, we say that the normality assumption is satisfied.

Explanation / Answer

8. This is true.

9. A completely randomized design relies on randomization to control for the effects of extraneous variables. The experimenter assumes that, on averge, extraneous factors will affect treatment conditions equally; so any significant differences between conditions can fairly be attributed to the independent variable.This is true.

10. A 45-degree reference line is also plotted. If the two sets come from a population with the same distribution, the points should fall approximately along this reference line. The greater the departure from this reference line, the greater the evidence for the conclusion that the two data sets have come from populations with different distributions.

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