Final answer:
At least 95 percent of the data points are within k=2 standard deviations of the mean.
Step-by-step explanation:
The Empirical Rule states that approximately 95 percent of the data points are within two standard deviations of the mean. This means that at least 95 percent of the data points will be within k=2 standard deviations of the mean.
For example, if the mean is 10 and the standard deviation is 2, at least 95 percent of the data points will be between 6 and 14 (10 - 2*2 and 10 + 2*2).
Therefore, at least 95 percent of the data points are within k=2 standard deviations of the mean.