For each of the following experiments, identify the subjects, the factors, the t

Question

For each of the following experiments, identify the subjects, the factors, the treatments, and the response variables 9.4 Ginkgo extract and the post-lunch dip. The post-lunch dip is the drop in men- tal alertness after a midday meal. Does an extract of the leaves of the ginkgo tree reduce the post-lunch dip? Assign healthy people aged 18 to 40 to take either ginkgo extract or a placebo pill. After lunch, ask them to read seven pages of random letters and place an X over every e. Count the number of misses.

Explanation / Answer

Question 9.4

Answer:

For the given case study, the subjects, the factors, the treatments, and the response variables are given as below:

Subjects: Healthy people aged 18 to 40

Factor: Mental alertness

Treatments: Ginkgo extract and placebo pill

Response variable: Number of misses

Question 9.8.a

Answer:

For the given scenario, the response variable is given as GMAT score. Here, we have to design the experiment for two randomly assigned groups of 25 students. At primary stage, the GMAT scores would be comparing by using the independent two sample t test for checking the significant difference between the average GMAT scores by using online treatment and classroom treatment. If there are more factors, then we will use completely randomized design for the comparison purpose.

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