Math Problem Statement

Find the area of the shaded region. The graph depicts the standard normal distribution with mean 0 and standard deviation 1.

Solution

This problem involves finding the area of the shaded region under the standard normal distribution curve, which is a bell-shaped curve with a mean of 0 and a standard deviation of 1.

The shaded region lies between two z-scores: z=2.36z = -2.36 and z=1.18z = -1.18.

To find the area of this shaded region, we can use the cumulative distribution function (CDF) for the standard normal distribution. The steps are as follows:

  1. Find the cumulative probability for z=1.18z = -1.18 (which gives the area to the left of this z-score).
  2. Find the cumulative probability for z=2.36z = -2.36 (which gives the area to the left of this z-score).
  3. Subtract the second probability from the first to get the area between z=2.36z = -2.36 and z=1.18z = -1.18.

Using Standard Normal Table or Calculator:

  • The cumulative probability for z=1.18z = -1.18 is approximately 0.11900.1190.
  • The cumulative probability for z=2.36z = -2.36 is approximately 0.00910.0091.

Calculate the area:

Area=P(z=1.18)P(z=2.36)=0.11900.0091=0.1099\text{Area} = P(z = -1.18) - P(z = -2.36) = 0.1190 - 0.0091 = 0.1099

So, the area of the shaded region is approximately 0.1099.

Would you like more details or further clarification?

Here are 5 related questions for further study:

  1. How do you calculate the z-score for a given data point?
  2. What is the significance of the area under the normal curve in probability theory?
  3. How can you calculate areas for non-standard normal distributions?
  4. What is the difference between the z-distribution and t-distribution?
  5. How is the standard normal distribution used in hypothesis testing?

Tip: When using a standard normal table, remember that it gives the cumulative probability from the far left of the curve up to the specified z-score.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Probability
Statistics
Standard Normal Distribution

Formulas

Cumulative distribution function (CDF) for the standard normal distribution
Area = P(z1) - P(z2)

Theorems

Standard Normal Distribution Theorem
Properties of the Cumulative Distribution Function (CDF)

Suitable Grade Level

Grades 11-12 or college-level statistics