For the normal distribution, the mean plus and minus two standard deviations will include about 95% percent of the observations.
<h3>What is normal distribution?</h3>
Normal distribution refers to a set of data which are neither skewed to the left or to the right, thus are said to be normally distributed.
The shape of a normal distribution curve is a bell-shaped curve.
The total area under a normal distribution curve is 100.
The mean value of data that is normally distributed is the the value that divides the curve into two halves of 50% each.
66% of the data are plus and minus one standard deviation from the mean.
95% of the data are plus and minus two standard deviations from the mean.
99.7% of the data are plus and minus three standard deviations from the mean.
In conclusion, a normal distribution has no skewness.
Learn more about normal distribution at: brainly.com/question/4079902
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