A researcher would like to determine if brief aerobic dancing is a more effectiv
ID: 3244686 • Letter: A
Question
A researcher would like to determine if brief aerobic dancing is a more effective treatment thar the standard bicycling regimen for elderly persons. The researcher measures heart rate recovery (HRR), where lower HRR scores indicate better fitness. Nine persons volunteered for the study, giving their HRR scores after a month of bicycling, and again after a month of aerobic dance exercise. The researcher predicted lower heart rate recovery scores following dance -and hence better fitness. Below are the heart rate recovery scores for each treatment condition After Dance Regimen Treatment 2 2 Pre-Treatment Bicycling Participant Treatment 1 4 2 7 9 6Explanation / Answer
Correct Answer: Option (C) Dependent 't' Test
It is also called Paired 't' test. Given the samples are dependent since the 9 persons are considered in the first sample (measure the HRR scores after a month of bycycling) and the same persons are also considered in the second sample (measure the HRR scores again after a month of aerobic dance exercise).
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