Chapter 6: Q.4 (page 385)
A company manufactures rubber balls. The mean diameter of a ball is with a standard deviation of 0.2 cm. Define the random variable in words. ______________.
Short Answer
Diameter of a ball in centimeter.
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Chapter 6: Q.4 (page 385)
A company manufactures rubber balls. The mean diameter of a ball is with a standard deviation of 0.2 cm. Define the random variable in words. ______________.
Diameter of a ball in centimeter.
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Suppose X ~ N(12, 6). What is the z-score of x = 2?
A bottle of water contains fluid ounces with a standard deviation of ounces. Define the random variable in words. ____________.
Suppose that Ricardo and Anita attend different colleges. Ricardo's GPA is the same as the average GPA at his school. Anita's GPA is standard deviations above her school average. In complete sentences, explain why each of the following statements may be false.
a. Ricardo's actual GPA is lower than Anita's actual GPA.
b. Ricardo is not passing because his -score is zero.
c. Anita is in the percentile of students at her college.
The scores on a college entrance exam have an approximate normal distribution with mean, points and a standard deviation, points.
a. About of the values lie between what two values? These values are ________________. The -scores are ________________, respectively.
b. About of the values lie between what two values? These values are ________________. The -scores are ________________, respectively.
c. About of the values lie between what two values? These values are ________________. Thescores are ________________, respectively.
Use the following information to answer the next four exercises:
Find the probability that
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