Classify the following experiments according to their experimental designs. Some

Question

Classify the following experiments according to their experimental designs. Some labels may be used more than once A sample of 40 adults was separated into men and women. The members of each group were randomly assigned to two different exercise routines. The responses of each adult were recorded at the completion of the experiment. block design (not matched pairs) A sample of 50 vegetable plants was grouped into pairs of similar individuals based on type and size. Then, within these pairs, each vegetable plant was assigned to a different fertilizer. After three weeks, the responses of each pair were analyzed to compare the effects of the fertilizers matched pairs design completely randomized designlwenty race cars were assigned to drive two laps, once with fuel A and once with fuel B. The order of treatments was randomized for each race car. The lap times of each race car were recorded to compare the effects of the two different treatments A random sample of 100 rivers was selected in a particular region. To assess the relationship between water quality and invertebrate diversity, the water quality and the count and species identity of all invertebrates in each river were recorded observational study

Explanation / Answer

here all parts seems ok assigned exept part 3 ; cause we are bifurcating with fuel A and Bbut subject (car) is same ; therefore that should be

( matched pairs)

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