The expression
Means:
a. In repeated samples, you are 95 percent certain that the value of x is µ.
b. Once you take a specific sample and calculate the value of x, you are 95 percent certain that the value calculated is µ.
c. The probability that population mean deviates from the sample mean is 95%.
d. Ninety five percent (95%) of the means from samples size n deviate from the population mean by no more than ± standard errors.