using a two-sample t-test , Biology

 After stinging its victim, the honeybee leaves behind the barbed stinger, poison sac, and muscles that continue to pump venom into the wound. A study compared two methods of removing the stinger left behind: scraping off with a credit card or pinching off with thumb and index finger. A total of 40 stings were induced on volunteers. Twenty were removed with the credit card method, and twenty were removed with the pinching method. The size of the welt left by each sting was measured ten minutes later. All 40 measurements came from two volunteers, every of whom received one treatment ten times on one arm and the other treatment ten times on the other arm.

a.    The data were analyzed using a two-sample t-test with a sample size of 20 for each treatment. What is wrong with this approach? verify the problem by name, and describe how it can lead to misleading results.

b.    What test would be a better choice for these data?

c.    Suggest an improvement in the experimental design.


Posted Date: 3/16/2013 7:24:37 AM | Location : United States

Related Discussions:- using a two-sample t-test , Assignment Help, Ask Question on using a two-sample t-test , Get Answer, Expert's Help, using a two-sample t-test Discussions

Write discussion on using a two-sample t-test
Your posts are moderated
Related Questions
Q. Vitamins requirement in dyslipidemia? Antioxidants and flavonoids, natural vitamin E, vitamins C and Aare nutrients (vitamins) that scavenge cell-damaging free radicals and

St. Jude Medical Valve (SJM) :  This is a low profile bi-leaflet valve, which was introduced in 1977. The leaflets and the housing are made of pyrolitic carbon. The currently

Explain xylose isomeras A mixture of glucose and fructose, is produced from sucrose by the action of yeast invertase (β-fructofuranosidase), an enzyme which can only be extrac

Explain the Kidney Function in human biology? Blood first enters the capillaries in Bowman's capsule where it is filtered. The pores in the capillary walls allow water and smal

Dextrorotatory:- When  an  optically .active substance rotates  the plane of polarized light in a clockwise direction.

Prothoracic Gland or PTC Prothoracic gland (PTC) or moulting gland and ecdysone or moulting hormone The 3 rd endocrine gland-prothoracic gland- is an irregular branching

Determine the Human Energy Requirements? This unit focuses on the human energy requirements. The nutrient requirement for Indian population, you may recall studying in the last

Cotyledon is a leaf-like structure which is present in the seeds of the flowering plants; it appears during seed germination and sometimes is referred to as the seed leaf.

difference between holophytic nutrition and holozoic nutrition.

Explain the Physical Methods to Control Microorganisms? The physical methods to control microorganisms involve heat, filtration or radiations. Figure illustrates these methods.