Find the margin of error for the given values of c s and n c

Find the margin of error for the given values of c, s and n. c=0.90, s=2.3, n=100

Solution

We know the margin of error is:

E = z * s / ?n

For a 90% confidence interval, use z = 1.645.

Substituting the value for z, s, and n gives:

s=2.3, n=100

E = (1.645)(2.3) / ?100

E = 0.3785