Answer
Given p = 79% = 0.79 and n = 6
a. Mean = n x p
= 6 x 0.79 = 4.74
b. Variance = n x p (1-p)
= 6 x 0.79 (0.21) = 1.0
c. S.D = \sqrt Variance
=\sqrt 0.9954 = 1.0
d. On average 4.74 out of 6 workers know what their CEO looks like. The standard deviation is 1.
Work Step by Step
As given in answer