Explanation Given info: The cumulative area to the right of z -score is 0.0233. Calculation: The area under the standard normal curve represents the probability value. From the given figure, the area of the shaded region is 0.0233. That is, the cumulative area to the right of z -score is 0.0233. But, the Table 4: Standard normal distribution applies only for cumulative areas from the left. Thus, ( Cumulative area to the left of z -score ) = 1 −

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ISBN: 9781323839577

Author: Larson

Publisher: Pearson Custom Publishing

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Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 5.3, Problem 19E

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To obtain: The indicated z-score.

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Chapter 5.3, Problem 18E

Chapter 5.3, Problem 20E

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To obtain: The indicated z- score.

Solution Summary: The author explains that the cumulative area to the right of z -score is 0.0233. Table 4: Standard normal distribution applies only for cumulative areas from the left.

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To obtain: The indicated z-score.

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Chapter 5 Solutions