A pollster asks a single question with only yes and no as answer possibilities. The poll is conducted nationwide, so samples of 100 responses are taken. There are two yes answers for every three no answers overall. For the sampling distribution of sample proportions of yes, find the following answers. (a)The expected value.   (b)The standard deviation. (Round your answer to four decimal places.)   (c)The variance. (Round your answer to four decimal places.)

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