Question

The medical researcher is comparing two treatments for lowering cholesterol: diet and meds. The researcher wants to see if the patients who receive the recommendation to change their diet have equal success lowering cholesterol compared to a prescription of meds. A random sample of some patients who received the recommendation to change their diet and others who were prescribed meds was taken. The results of how many did or did not lower their cholesterol are shown below: Data on Diet vs. Meds for Weight Loss Diet Meds Yes416 No 155 152 558 What can be concluded at the a = 0.10 level of significance? For this study, we should use Select an answer a. The null and alternative hypotheses would be: Ho: Select an answer Select an answer Select an answer (please enter a decimal)

Answer 1

For this study, we should usez-test for the difference between two population proportions

1. The null and alternative hypotheses would be:   

H₀: p₁ = p₂

H_a: p₁ ≠ p₂

1. The test statistic ? z  = -2.391
2. The p-value = 0.0168
3. The p-value is ≤  
4. Based on this, we should reject the null hypothesis.

f. Option D

g.Option A

h. Option C

p1	p2	pc
0.7285	0.7859	0.7603	p (as decimal)
416/571	558/710	974/1281	p (as fraction)
416.	558.	974.	X
571	710	1281	n
	-0.0574	difference
	0.	hypothesized difference
	0.024	std. error
	-2.391	z
	.0168	p-value (two-tailed)