Math Problem Statement

The scores on a standardized test for a certain year are modeled using the normal distribution shown below. The mean of the distribution is 76.5 points and the standard deviation is 5.2 points. In the figure, V is a number along the axis and is under the highest part of the curve. And, U and W are numbers along the axis that are each the same distance away from V. Use the empirical rule to choose the best value for the percentage of the area under the curve that is shaded, and find the values of U, V, and W.

Solution

The image you uploaded depicts a normal distribution with a mean of 76.5 points and a standard deviation of 5.2 points. Based on the description, it seems you're asked to identify values for UU, VV, and WW based on the empirical rule and determine the shaded area under the curve.

Key points from the description:

  1. The mean of the distribution is 76.5, and the standard deviation is 5.2.
  2. VV is the value on the axis at the peak of the curve (the mean).
  3. UU and WW are each the same distance from VV along the axis.

Using the empirical rule (also known as the 68-95-99.7 rule):

  • Approximately 68% of the data falls within one standard deviation of the mean.
  • Approximately 95% falls within two standard deviations.
  • Approximately 99.7% falls within three standard deviations.

To find the specific values of UU, VV, and WW:

  • VV is the mean: 76.5.
  • UU and WW are one or more standard deviations away from VV.

Would you like to proceed with the exact calculations, including the shaded area?

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Math Problem Analysis

Mathematical Concepts

Normal Distribution
Empirical Rule (68-95-99.7 Rule)
Standard Deviation
Mean

Formulas

Empirical Rule (68-95-99.7 Rule)

Theorems

Empirical Rule

Suitable Grade Level

Grades 9-12