Insurance companies are interested in knowing the popuiation percent of drivers

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Insurance companies are interested in knowing the popuiation percent of drivers who always buckle up before riding in a car to determine this population propertion, what is the minimum number of drivers you would need to survey to be 95% content that the population prepoten ls estimated to within Q.02(Round your answer up to the nearest whole number.) x driver You may need to use a critical value table to answer this question. PTC Is a substance that has a strong bitter taste for some people and is tasteless for others. The ability to taste PTC is inhenited. About 70% of Italians can taste PTC, for example. You want to estimate the proportion of Amereans who have at least one Italian grandparent and can taste PTC. Starting with the 70% estmate for italiana, hoe lage a sample must you colet n odete estimate the proportion of PTe tasters within ±0.04 with 90% condence, Round your answer up to the nearest whole number) A university conducted·Study of whether nanning is healthy for men and women over age so. Dunng the first-ght yean of the stud. 9 athe 457 memben ora ntness so cabon interested in the proportion of people over S0 who ran and died in the same eight-year period. we ae NOTE: 1t you are using a Student's t-distribution, you may assume that the underlying pepulation is normally distributed. (In general, you must first prove that assumpeion, though) Part Define the Random Variables X and p, in words Xis the number of al nunners that de, and p is the proportion of nuners that

Explanation / Answer

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first option ; X is the number of people who ran and died in the eight year period and p is the proportion...........

here margin of error E = 0.02 for95% CI crtiical Z          = 1.9600 estimated proportion=p= 0.500 required sample size n =         p*(1-p)*(?/E)2= 2401.00

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