A sample is obtained from a population with s = 20. If the sample mean has a standard error of 5 ...

A sample is obtained from a population with s = 20. If the sample mean has a standard error of 5 points, then the sample size is n = 4.
 
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Question 2

Using a two-tailed test with  = .05, a sample correlation of r = 0.355 for a sample of n = 30 individuals is large enough to conclude that there is a real correlation in the general population.
 
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Question 3

On average, a sample of n = 16 scores from a population with s = 10 will provide a better estimate of the population mean than you would get with a sample of n = 16 scores from a population with s = 5.
 
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Question 4

In a test for significance of a Pearson correlation for a sample of n = 30 individuals, one determines the critical value by using df = 29.
 
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Question 5

The smallest possible standard error is obtained when a small sample is taken from a population with a small standard deviation.
 
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