Suppose X~N(11,4)

What is the x value that is 1- standard deviation to the left of the mean

To find the x value that is 1 standard deviation to the left of the mean, we need to subtract 1 standard deviation from the mean.

Mean (μ) = 11
Standard deviation (σ) = 4

1 standard deviation to the left of the mean can be calculated as:
x = μ - σ

Substituting the given values:
x = 11 - 4

Therefore, the x value that is 1 standard deviation to the left of the mean is 7.