Assume that a population has a mean of 14 with a standard deviation of 2. If a random sample of 49 observations is drawn from this population, the standard error of the sample mean is closest to:

[单选题]A sample of 25 observations has a mean of 8 and a standard deviation of 15.

[单选题]A sample of 25 observations has a mean of 8 and a standard deviation of 15.

[单选题]A sample of 240 managed portfolios has a mean annual return of 0.11 and a s

[单选题]A sample of 240 managed portfolios has a mean annual return of 0.11 and a s

[单选题]Annual returns on small stocks have a population mean of 12% and a populati

[单选题]A simple random sample is a sample drawn in such a way that each member of

[单选题]A sample of 100 observations drawn from a normally distributed population h

[单选题]If nis large and the population standard deviation is unknown, the standard

[单选题]A sample of 438 observations is randomly selected from a population. The me

[单选题]The standard error of the sampling distribution of the sample mean for a sa