Acoin is tossed 72 times. find the standard deviation for the number of heads that will be tossed

The probability of obtaining a head or tail in tossing a coin is modeled by the binomial distribution.

The probability of obtaining heads (success) is p = 1/2.
In n tosses, the expected statistical parameters are
m = np, the mean
σ = √[np(1-p)]

In 72 tosses of the coin, the standard deviation for the number of heads obtained is
σ = √[72*(0.5)*(0.5)]
   = 4.243

4.243