2.70. Hypotheses For each scenario below write out the hypotheses (both Ho and H
ID: 3043841 • Letter: 2
Question
2.70. Hypotheses For each scenario below write out the hypotheses (both Ho and Ha) using proper notation. (a) On January 31, 2010 the congressional health care proposal appeared unlikely to pass. Suppose that Reuters News Service decides to take a survey of 1200 adult Americans to determine if fewer than half of all adult Americans approve of the congressional health care bill (b) Columbia University statistics professor Andrew Gelman claims that he can tell if a series of coin flips results from actual coin flipping or if it results from students simply writing down a series of heads and tails without actually flipping a coin. We decide to test his claim, we agree upon more than 75% success convincing us that Gelman can tell if a series of coin flips results from actual coin flipping or if it results from students simply writing down a series of heads and tails without actually flipping the coin. (c) A franchise coffee shop (let's call it Moondollars) wants to determine if the proportion of customers who use a coupon when purchasing a hot coffee drink is . Siguificantly fewer than means that the marketing may not be drawing enough people into the store while significantly more than i may mean that the company is losing profits because regular customers who would come to the store with or without a coupon spending less moneyExplanation / Answer
a) Ho : p <= 0.5
Ha : p > 0.5
Where p is the proportion of Americans who approve of the health care bill.
b) Ho : s >= 0.75
Ha : s < 0.75
Where s is the success rate of telling if the coin flip is real or fake
c) Ho : p = 1/3
Ha : p != 1/3
Where p is the proportion of people who use a coupon when purchasing a hot coffee. != Means not equal to.
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