Concept explainers
For Exercises 7.55–7.57, refer to Equations (7.1) and (7.2) on pages 315 and 316, respectively.
7.56 Heights of Starting Players. In Example 7.5, we used the definition of the standard deviation of a variable (Definition 3.12 on page 142) to obtain the standard deviation of the heights of the five starting players on a men’s basketball team and also the standard deviation of
- a. Apply Equation (7.1) to compute σx for samples of sizes 1, 2, 3, 4, and 5. Compare your answers with those in Table 7.6.
- b. Use the simpler formula, Equation (7.2), to compute σx for samples of sizes 1, 2, 3, 4, and 5. Compare your answers with those in Table 7.6. Why does Equation (7.2) generally yield such poor approximations to the true values?
- c. What percentages of the population size are samples of sizes 1, 2, 3, 4, and 5?
Want to see the full answer?
Check out a sample textbook solutionChapter 7 Solutions
Introductory Statistics (10th Edition)
Additional Math Textbook Solutions
Essential Statistics
Statistical Reasoning for Everyday Life (5th Edition)
Probability and Statistics for Engineering and the Sciences
Business Analytics
Essentials of Statistics (6th Edition)
Intro Stats, Books a la Carte Edition (5th Edition)
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill