Question

answer the following. (a) the standard normal curve is graphed below. shade the region under the standard normal curve to the left of z = -0.50. (b) use this table or the aleks calculator to find the area under the standard normal curve to the left of z = -0.50. give your answer to four decimal places (for example, 0.1234).

Explanation:

Step1: Use standard - normal table

We look up the z - value of - 0.50 in the standard - normal table. The standard - normal table gives the cumulative probability (area under the curve to the left of the z - value) for values of z.

Step2: Find the area

Looking up z=-0.50 in the standard - normal table, we find that the area to the left of z = - 0.50 is 0.3085.

Answer:

0.3085