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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.
Cobalt Cobalt functions as a component of vitamin B12 (cobalamin). Ruminants are not dependent on a dietary source of vitamin B12 because ruminal microorganisms can synthesize B
Consider Neuron B in the frog central nervous system whose plasma membrane has a previously unknown channel that is selectively conductive to a newly discovered tetravalent anion n
A newborn baby with a patent foramen ovale or a ventricular septal defect might be cyanotic (blue). Will a two-year-old with these defects also be cyanotic? Explain your answer.
Enumerate the term - Clinical neuroscience Clinical neuroscience concerns the study of clinical populations both to well understand neuroanatomy and to test psychological theor
Explain the Transmission Electron Microscope Here, thin and dehydrated specimen is used. Electrons pass through the specimen and form image on to photographic film. These are u
Q. Classification of plant on the basis of their resemblances? Pliny seemed to have little interest in the classification of plant on the basis of their resemblances. He classi
Myeloid immunodeficiency causes phagocytic function, which is impaired. Those who are affected with this will undergo with enhance in susceptibility to bacterial infection.
Comparing to cyclostomes (primitive vertebrates) what are the main novelties presented by fishes? Compared to cyclostomes, evolutionary novelties shown by fishes are: pectoral
What are the excretory organs in protozoa.
Q. Which is the kind of nitrogen waste eliminated by beings of the class Reptilia? These beings excrete mainly uric acid this substance is less toxic than ammonia and it can be
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