1 / 12

Statistical Problems on Mean, Variance, and Coefficient of Variation

This chapter presents a series of problems focused on statistical methods involving mean, variance, and the coefficient of variation. It covers the calculations of the mean (X̄), standard deviations (SD, S0), and their respective coefficients of variation (CV) for various datasets. Detailed explanations and step-by-step solutions are provided for Problems 4-5 through 4-26, including examples and contingency tables. The chapter emphasizes understanding data trends and analysis for practical applications in statistical measurements.

nibaw
Télécharger la présentation

Statistical Problems on Mean, Variance, and Coefficient of Variation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 4

  2. Problem 4-5

  3. Problem 4-10

  4. Problem 4-11

  5. Problem 4-13(a)

  6. Problem 4-13(b & c)

  7. Problem 4-19(Data) X = 154 (X - X)2 = 62.80

  8. Prob 4-19 cont’d

  9. Problem 4-19(from previous edition)

  10. Problem 4-20 (from previous edition) XD = 47 X0 = 78 SD = 10 S0 = 15 • CV = (S /X) ×(100) • CVD = (10/47) ×(100) = 21.28% • CVO = (15/78) ×(100) = 19.23%

  11. Problem 4-22 (from previous edition) • X<10 = $5.25 X>60 = $92.50 • S<10 = $1.52 S>60 = $5.28 • CV = (S /X) ×(100) • CV>60 = (5.28/92.5) × 100 = 5.71% • CV<10 = (1.52/5.25) × 100 = 28.95%

  12. Problems 4-24, 25, 36 4.24. • a. 15 • b. More labor hours are required as the number of rooms increases. 4.25. a. Both variables are nominal. • b. Contingency table • c. Yes, because 32% is more than twice 15%. 4.26. a. Opinion is ordinal and number of shares is ratio. • b. Contingency table • c. Those who own over 1000 shares.

More Related