Two ethnic groups were compared for the prevalence of cigarette smoking. Of the

Question

Two ethnic groups were compared for the prevalence of cigarette smoking. Of the 1,000 in group 28% were considered to be regular smokers. Of the 1,000 in group B 22% were considered to be smokers. Test the hypothesis that the percent of smokers in group B is less than the smokers in group A.
Is the claim supported? True or False Two ethnic groups were compared for the prevalence of cigarette smoking. Of the 1,000 in group 28% were considered to be regular smokers. Of the 1,000 in group B 22% were considered to be smokers. Test the hypothesis that the percent of smokers in group B is less than the smokers in group A.
Is the claim supported? True or False
Is the claim supported? True or False

Explanation / Answer

Test and CI for Two Proportions

Sample X N Sample p
1 280 1000 0.280000
2 220 1000 0.220000

Difference = p (1) - p (2)
Estimate for difference: 0.06
95% lower bound for difference: 0.0282241
Test for difference = 0 (vs > 0): Z = 3.11 P-Value = 0.001

Fisher's exact test: P-Value = 0.001

P-Value < 0.05 so we reject the null hypothesis we conclude that percent of smokers in group B is less than the smokers in group A.

True. Claim is supported.

Hope this will be helpful. Thanks and God Bless you :-)

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