the mean and the standard deviation of the sampled population are, respectively, 77.4 and 4.0. find the mean and standard deviation of the sampling distribution of the sample mean for samples of size . round your answers to one decimal place.
the mean and the standard deviation of the sampled population are, respectively, 77.4 and 4.0. find the mean and standard deviation of the sampling distribution of the sample mean for samples of size . round your answers to one decimal place.
Answer: The mean of the sampling distribution of the sample mean for samples of size n=225 is equal to the population mean, which is 77.4. The standard deviation of the sampling distribution of the sample mean is the population standard deviation divided by the square root of the sample size. Therefore, the correct answer is:
D. mean = 77.4, standard deviation = 0.3