Answer:
Suppose X ~ N(12,2) represents a normal distribution with mean 12 and standard deviation 2. According to the empirical rule, about 68% of the x values lie within one standard deviation of the mean .
We can calculate the endpoints of the interval that represents one standard deviation from the mean as follows:
Lower endpoint: 12 - 2 = 10
Upper endpoint: 12 + 2 = 14
Therefore, about 68% of the x values lie between 10 and 14 1.
Explanation: