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Step 1: The 2SD formula is used to calculate the interval that contains a specified proportion of data in a normal distribution.
where $\mu$ is the population mean and $\sigma$ is the population standard deviation.
In this case, we want to find the interval containing 95% of the data, which is equivalent to two standard deviations (2SD) from the mean. The formula for the 2SD interval is as follows:
Step 2: In the context of a normal distribution, 95% of the data falls within two standard deviations of the mean.
This means that the interval calculated using the 2SD formula will contain 95% of the data points.
Final Answer
2SD \ interval = [\mu - 2\sigma, \mu + 2\sigma] where $\mu$ is the population mean and $\sigma$ is the population standard deviation.
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