Given the normal curve:
Between z = -3.05 and z = 3.05
Let's find the indicated area under the standard curve.
To find the area, we have:
P(-3.05 < z < 3.05) = P(z < 3.05) - P(z < -3.05)
Using the standard normal diatribution table, we have:
NORMSDIST(3.05) = 0.9989
NORMSDIST(-3.05) = 0.0011
Thus, we have:
P(z < 3.05) - P(z < -3.05) = 0.9989 - 0.0011 = 0.9978
Therefore, the indicated area under the standard normal curve is 0.9978
ANSWER:
0.9978