[answered] A random sample of size n = 290 is taken from a population

 A random sample of size?n?= 290 is taken from a population with population proportion?P?= 0.75.?

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 a. Calculate the expected value and the standard error for the sampling distribution of the sample proportion.(Round "expected value" to 2 decimal places and "standard error" to 4 decimal places.)

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 ? ??Expected value ?? ??Standard error ??

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 b. What is the probability that the sample proportion is between 0.70 and 0.80??(Round ?z? value to 2 decimal places, and final answer to 4 decimal places.)

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 ??Probability ??

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 c. What is the probability that the sample proportion is less than 0.70??(Round ?z? value to 2 decimal places, and final answer to 4 decimal places.)

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This question was answered on: Sep 18, 2020

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