According to One Study, 50% of Americans Admit to Overeating

question 113

Short Answer

According to one study, 50% of Americans admit to overeating sweet foods when stressed. Suppose that the 50% figure is correct and that a random sample of n = 100 Americans is selected.
Does the distribution of , the sample proportion of Americans who relieve stress by overeating sweet foods, have an approximately normal distribution?
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What is the mean?
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What is the standard deviation?
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What is the probability that the sample proportion, , exceeds 0.54?
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What is the probability that lies within the interval 0.39 to 0.59?
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Would it be unusual if the sample proportion were as small as 34%?
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Definitions:

Defibrillator

A medical device that delivers a dose of electrical energy to the heart to treat life-threatening cardiac dysrhythmias.

Ventricular Fibrillation

A life-threatening heart rhythm that results in rapid, erratic electrical impulses, causing the ventricles to quiver ineffectively.

Palpitations

Unusually rapid, strong, or irregular pulsations of the heart.

Concussion

A traumatic brain injury caused by a blow to the head or body, leading to temporary loss of normal brain function.