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If we have a sample size of 100 and the estimate of the population proportion is .10, the standard deviation of the sampling distribution of the sample proportion is?

Suppose that the percentage returns for a given year for all stocks listed on the New York Stock Exchange are approx. normally distributed with a mean of 12.4 percent and a standard deviation of 20.6 percent. Consider drawing a random sample of n = 5 stocks from the population of all stocks and calculating the mean return, sample mean of the sampled stocks. Find the mean and the standard deviation of the sampling distribution of sample mean and find an interval containing 95.44 percent of all possible sample mean returns.

When the population is normally distributed, population standard deviation ? is unknown, and the sample size is n = 15; the confidence interval for the population mean ? is based on which of the following: (a) z (normal) distribution (b) t distribution (c) Binomial distribution (d) Poisson Distribution (e) None of the above

Suppose that the percentage returns for a given year for all stocks listed on the New York Stock Exchange are approx. normally distributed with a mean of 12.4 percent and a standard deviation of 20.6 percent. Consider drawing a random sample of n = 5 stocks from the population of all stocks and calculating the mean return, sample mean of the sampled stocks. Find the mean and the standard deviation of the sampling distribution of sample mean and find an interval containing 95.44 percent of all possible sample mean returns.

When the population is normally distributed, population standard deviation ? is unknown, and the sample size is n = 15; the confidence interval for the population mean ? is based on which of the following: (a) z (normal) distribution (b) t distribution (c) Binomial distribution (d) Poisson Distribution (e) None of the above

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