Statics Probability Question:

To calculate confidence intervals we need make use of:

1. Sampling distributions.
2. Histograms.
3. z-scores.
4. None of the above.

Answer: sampling distributions.

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The standard error has been calculated as 2.6 and the sample mean is 10.00. Thus the 95% confidence interval lies between:	A sample mean is a ____ estimate and we do not know how close it is to the population mean.