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According to a recent national poll, 41% of females and 32% of males identify as democrats. Suppose a random sample of 120 females and 140 males is obtained.What is the value of the parameters for the binomial random variable X, the number of democrats in the sample of 120 females?n =   (report your answer in whole numbers)p =   (report your answer to two decimal places)

Question

According to a recent national poll, 41% of females and 32% of males identify as democrats. Suppose a random sample of 120 females and 140 males is obtained.What is the value of the parameters for the binomial random variable X, the number of democrats in the sample of 120 females?n =   (report your answer in whole numbers)p =   (report your answer to two decimal places)

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Solution

The parameters for the binomial random variable X, the number of democrats in the sample of 120 females are:

n = 120 (This is the total number of trials, which in this case is the total number of females sampled)

p = 0.41 (This is the probability of success on each trial, which in this case is the probability that a randomly selected female identifies as a democrat)

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