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 (or use a calculator with a normal - distribution function). The standard - normal table gives the cumulative probability from negative infinity to a given z - value.

Step2: Find the area

Looking up z = 0.50 in the standard - normal table or using a calculator, we find that the area under the standard normal curve to the left of z = 0.50 is 0.6915.

Answer:

0.6915