Question: For the following, determine whether the samples are independent or they consist of matched pairs

(a) The effectiveness of Prilosec for the treatment of heartburn is tested by measuring gastric acid secretion in a group of patients treated with Prilosec and another group of patients who received placebo

(b) The effectiveness of Prilosec for the treatment of heartburn is tested by measuring gastric acid secretion in patients treated before and after the treatment. The data consists of reported weight and measured weight for each subject.

(c) The accuracy of verbal response is tested in an experiment in which subjects report their weights and they are then weighed on a physician’s scale. The data consists of reported weight and measured weight for each subject.

(d) The effectiveness of sugar as an ingredient is tested with a sample of cans of regular coke and another sample of cans of Coke.