Empirical research on stock market data indicates that over the course of a year, 50% of stocks go up. A random sample of 400 stocks is going to be chosen at the beginning of next year. Let ^p be the proportion of stocks in the sample that go up over the course of a year. a.) find ^p b.) find the standard deviation of ^p c.) compute an approximation for P(^p<0.48), which is the probability that fewer than 48% of the stocks in the sample go up over the course of the year. Round your answer to four decimal places.
Empirical research on stock market data indicates that over the course of a year, 50% of stocks go up. A random sample of 400 stocks is going to be chosen at the beginning of next year. Let ^p be the proportion of stocks in the sample that go up over the course of a year. a.) find ^p b.) find the standard deviation of ^p c.) compute an approximation for P(^p<0.48), which is the probability that fewer than 48% of the stocks in the sample go up over the course of the year. Round your answer to four decimal places.
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter1: Functions
Section1.2: The Least Square Line
Problem 1E
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Empirical research on stock market data indicates that over the course of a year, 50% of stocks go up. A random sample of 400 stocks is going to be chosen at the beginning of next year. Let ^p be the proportion of stocks in the sample that go up over the course of a year.
a.) find ^p
b.) find the standard deviation of ^p
c.) compute an approximation for P(^p<0.48), which is the probability that fewer than 48% of the stocks in the sample go up over the course of the year. Round your answer to four decimal places.
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