II TABLE 1 Normal Curve Areas The entries in the body of the table correspond to the area shaded under the normal curve. Then press ENTER . This means that the distribution has a mean, off zero and a standard deviation off. You can look up numbers in the z-table, like 0.92 or 1.32.The values you get from the table give you percentages for the area under a curve in decimal form. To find the area under a normal curve with mean μ and standard distribution σ: Then select 4:Normal Cdf . Chapter 6 The Normal Distribution 6.2 Areas under the Standard Normal Curve Table set up to accumulate the area under the curve from - ° to and specified value. Area Under the Normal Curve using Integration . Normal distribution is a continuous probability distribution. The area under the normal curve to the left of z = 1.53 would be graphically represented like this: The vertical line dividing the black shaded region from the white un-shaded region is z = 1.53. Find the area under the standard normal distribution curve. TABLE 1 Standard Normal Curve Areas z 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.0 0.5000 0.5040 0.5080 0.5120 0.5160 0.5199 0.5239 0.5279 0.5319 0.5359 Normal distribution calculator Enter mean (average), standard deviation, cutoff points, and this normal distribution calculator will calculate the area (=probability) under the normal distribution curve. The normal distribution density function f(z) is called the Bell Curve because it has the shape that resembles a bell.. Standard normal distribution table is used to find the area under the f(z) function in order to find the probability of a specified range of distribution. A graphical representation of a normal curve is as given below: The probability that an observation under the normal curve lies within 1 standard deviation of the mean is approximately 0.68. The probability of a continuous normal variable X found in a particular interval [a, b] is the area under the curve bounded by `x = a` and `x = b` and is given by `P(a