Candice Swank uses an illustration citing a study of 3300 minority girls in 20 US cities. The study was to prove the applicability of null and alternate hypothesis in a research model of determining the correlation between eating self-esteem and eating disorders (Novotney, 2009). Seven out ten girls experienced eating disorders as a result of low self-esteem and besides that, engaged in self-destructing activities like drinking, bullying and cutting themselves. Girls of Latin America descent were affected most when they moved to the USA. The hypothesis test however in her paper is not well proved; she only cites a potential alternate hypothesis. Self-esteem cannot be ruled out as the only cause of eating disorders; genetic makeup of a person, hormonal imbalance, and availability of food also play a part. Carrying out the studies on immigrants from Latin America is somewhat biased because even girls born in America suffer from the disorders. The study also fails to include the elderly and men who suffer from the disorders too but often go unreported. The alternate hypothesis is true because the data collected is biased and doesn’t cover the area under study full.
Monique Williams cites a work on the effect of physical activity on breast cancer radiation therapy. The purpose of the study was to prove the null hypothesis that physical activity affects the overall health of the patient and reduces symptoms intensity (V et al., 2017). Women that exercised come out better corporeal functioning and showed lesser severity in symptoms. The null hypothesis was correct because all the patient's variables were constant except walking home in the control group. Because similar medication was administered and special diets recommended, the conclusion was that exercising increased the health of patients under radiation therapy significantly.
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Hypothesis tests are very important in any work research. But for them to work properly variables need to be constant and the samples unbiased. Using biased sample population may lead to false and misleading data which has dire consequences in science and other fields.
References
Novotney, A. (2009). Eating disorders: New solutions . http://www.apa.org . Retrieved from http://www.apa.org/monitor/2009/04/treatments.aspx
V, M., KH, D., CJ, M., PM, G., JA, D., & ME, H. et al. (2017). Effects of exercise on fatigue, physical functioning, and emotional distress during radiation therapy for breast cancer. . Europepmc.org . Retrieved from http://europepmc.org/abstract/med/92435
