Hypothesis Testing and t-Test Analysis in Comparative Studies

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Hypothesis Testing and t-Test Analysis in Comparative StudiesChapter 14HomeworkQuestions 1-5below are based on the following scenario:A dog food manufacturer believes that he may have found a way to improve the taste of the dog foodmade by his company.However, he is not certain if the dogs will like the taste of the new formula.Totest the new process, the company recruited 12 dogs. The dogs were given the original food and thetime required to eat a standard portion of the food was measured. Two days later the same dogs werefed the same quantity of the new formula and the time was measured again. The following times wererecorded:DogOld ProcessNew ProcessA125120B115118C120120D140120E137131F150142G124125H132121I119117J147148K160135L1351281.Based on the scenario, should the alternative hypothesis be directional or non-directional?•The hypothesis is testing whether dogspreferthe new food (eat faster) or not.•Since we are interested in knowing if there is any difference in either direction (whether the dogs eatfaster or slower), the hypothesis isnon-directional.Answer:Non-directional2.What is thevalue oftobt?

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