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Chapter 2: Q T2.6. (page 149)

The figure shown is the density curve of distribution. Seven values are marked on the density curve. Which of the following statements is true?

a. The mean of the distribution is E.

b. The area between B and F is 0.50.

c. The median of the distribution is C.

d. The 3rd quartile of the distribution is D.

e. The area under the curve between A and G is 1.

Short Answer

Expert verified

The correct option is (e) The area under the curve between A and G is 1

Step by step solution

01

Given information

02

Explanation

It's true because the area beneath the density curve is always one, and the region between Aand G is linked to the entire area beneath the density curve.

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Most popular questions from this chapter

Brush your teeth The amount of time Ricardo spends brushing his teeth follows a Normal distribution with unknown mean and standard deviation. Ricardo spends less than 1 minute brushing his teeth about 40% of the time. He spends more than 2 minutes brushing his teeth 2% of the time. Use this information to determine the mean and standard deviation of this distribution.

Foreign-born residents Refer to Exercise 11 Here are summary statistics for

the percent of foreign-born residents in the 50 states:

a. Find and interpret the z-score for Montana, which had 1.9% foreign-born residents.

b. New York had a standardized score of 2.10 Find the percent of foreign-born residents in New York at that time.

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a. z>−1.66

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(a) At what percentile is an IQ score of 150?

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(c) MENSA is an elite organization that admits as members people who score in the top 2%on IQ tests. What score on the Wechsler Adult Intelligence Scale would an individual have to earn to qualify for MENSA membership?
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