Question 1141475
fixed n
presumably independent probability of 0.91 here
random sample
two outcomes, show up or not.
n=160
p=0.91
The mean is np
the variance is np((1-p)
the sd is sort (variance)
there is no k.
160, 0.91, 152 is what is inputted
or
Normal approximation
mean is 145.6, sd is 3.62
z<(152-146)/3.62
z<1.66