Photo by: Alila. Exocytosis is the cellular process in which intracellular vesicles in the cytoplasm fuse with the plasma membrane and release or secrete their contents into the extracellular space.
More generally, the formula for the 95% confidence interval on the mean is: Lower limit = M - (tCL)(sM) Upper limit = M + (tCL)(sM) where M is the sample mean, tCL is the t for the confidence level desired (0.95 in the above example), and sM is the estimated standard error of the mean.
For completeness, we need to know a few definitions 1  :-. Class Boundaries define the class interval - the upper class boundary (UCB) is the maximum possible value which would be in the class, and the lower class boundary (LCB) is the minimum value which would be in that class.