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how to find sample mean confidence interval. Confidence Intervals are one kind of estimation that allows us to assess where a population parameter eg. A confidence interval is a range of values that is likely to contain a population parameter with a certain level of confidence.
Statistics 101 Confidence Intervals Population Deviation Known Confidence Interval Statistics Math Statistics Notes from www.pinterest.com
Ttest weight One Sample t-test. Sample 1 mean sample 2 mean. It is calculated using the following general formula.
To state the confidence interval you just have to take the mean or the average 180 and write it next to and the margin of error.
Mean pm z fracSDsqrt n Where SD standard deviation and n is the number of observations or the sample size. A mean or a proportion probably falls between a range of values with a particular level of confidence usually 95 or 99. T 2046426 df 3324 p-value 22e-16. Sample 1 mean sample 2 mean.
