Answered: A randomly sampled group of patients at…

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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Question

A randomly sampled group of patients at a major U.S. regional hospital became part of a nutrition study on dietary habits. Part of the study consisted of a 50-question survey asking about types of foods consumed. Each question was scored on a scale from one (most unhealthy behavior) to five (most healthy behavior). The answers were summed and averaged. The population of interest is the patients at the regional hospital. The current survey was implemented after patients were subjected to this education, and it produced the following sample statistics for 25 patients sampled: and s = 1.02. We would like to know if the education improved nutrition behavior. We test the hypotheses H ₀: = 2.9 versus Ha: > 2.9. The value of the t test is 1.96, and:

	a.	P-value > 0.1.
	b.	0.025 P-value < 0.05.
	c.	0.25 P-value < 0.01.
	d.	0.05 P-value < 0.1.

Given the least squares regression line y = 3 x – 3, which of the following is true?

	a.	The relationship between x and y is positive.
	b.	The relationship between x and y is negative.
	c.	As x decreases, y increases.
	d.	None of the answer options is correct.