Answered: What is the purpose of blocking in a…

Math

Statistics

What is the purpose of blocking in a randomized block design?

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Some researchers have conjectured that stem-pitting disease in peach tree seedlings might be controlled with weed and sol treatment. An experiment was conducted to compare peach tree seedling growth with sol and weeds treated with one of two herbicides. In a field containing 20 seedlings, 10 were randomly selected from throughout the field and assigned to receive Herbicide A The remaining 10 seedlings were to receive Herbicide B. Soil and weeds for each seedling were treated with the appropriate herbicide and at the end of the study period the height (in centimeters) was recorded for each seedling. A box plot of each data set showed no indication of non-Normality. The following results were obtained: x (cm) s (cm) Herbicide A 945 10 Herbicide B 109.1 A 95% confidence interval for ug - Ha is given by which of the following expressions? (Use the conservative value for degrees of freedom) (109 1-94 5) t1 96 (109 1-94 5) + 2 263 109 1- 94 5)2196, . (109 1- 945)2262, (109 1- 94 5)
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Some researchers have conjectured that stem-pitting disease in peach tree seedlings might be controlled with weed and soil treatment. An experiment was conducted to compare peach tree seedling growth with soil and weeds treated with one of two herbicides. In a field containing 20 seedlings, 10 were randomly selected from throughout the field and assigned to receive Herbicide A. The remaining 10 seedlings were to receive Herbicide B. Soil and weeds for each seedling were treated with the appropriate herbicide and at the end of the study period the height (in centimeters) was recorded for each seedling. A box plot of each data set showed no indication of non-Normality. The following results were obtained: (cm) s (cm) Herbicide A Herbicide B 94.5 109.1 10 A 95% confidence interval for uB - HA is given by which of the following expressions? (Use the conservative value for degrees of freedom.) 102 9? (109.1- 94.5) t 1.96. 102 92 (109.1- 94.5) + 2.262. 9 10 (109.1- 94.5) + 1.96, 10 V 10 102…