Answered: A rival company, We Be Education…

Name: A rival company, We Be Education Company (WBEC), is also trying to dev
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Description: A rival company, We Be Education Company (WBEC), is also trying to develop a similar product which cost US$5,000 per year. Their researchers took a random sample of 81 students from a school district that had a mean reading comprehension score of µ =

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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A rival company, We Be Education Company (WBEC), is also trying to develop a similar product which cost US$5,000 per year. Their researchers took a random sample of 81 students from a school district that had a mean reading comprehension score of µ = 400 with a standard deviation of 100. After using the product for two semesters the mean reading comprehension scores for these 81 students was M = 419, z = 1.71, d = .19. Based on the obtained z value for the above WBEC study and an ⍺ level of .05, do they have sufficient evidence to reject their null hypothesis?

		Yes, the z score is outside of the crticial region.
		No, the z score is outside of the critical region
		No, the z score is in the critical region.
		Yes, the z score is in the critical region.

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