Identity the components of the following experiment In the l

Identity the components of the following experiment. In the late 1950\'s, a doctor reported in the Journal of the American Medical Association that stomach ulcers could be effectively treated by having a patient swallow a balloon connected to some tubes that circulated a refrigerated fluid. He argued that, by super-cooling the stomach, acid production was reduced and the ulcer relieved. All 24 of his patients received the treatment for 10 days and on average, acid production was reduced by at least 50%. Circle the hypothesis above. Sample size: Dependent variable: d. Name the component of a good experiment that is missing from this study. Cooled balloon Control Data from this study is graphed above. On the axes above, label one axis as the independent variable and the other axis as the dependent variable. Again, using the data in the graph above, was the hypothesis supported or rejected? What is the conclusion for this study?

Solution

a. Stomach ulcers could be cured by swallowing a balloon connected to tubes that circulated a refrigerated fluid.

b. sample size is 24.

c. Acid production is he dependent variable. Dependent variable is a variable (often denoted by y ) whose value depends on that of another.

d. control group is missing here.

e.cooled balloon is independent variable X and decrease in acid production is dependent variable y.

f.the hypothesis is rejected here. the control group which did not swallow any refrigerated fluid also showed decrease in acid production. The conclusion is, sample size is too small to come to a rational conclusion and no control group was set. the experiment is a failure.