According to a June 2004 Gallup poll, 28% of Americans "said there have been times in the last year when they haven't been able to afford medical care." Is this proportion higher for black Americans than for all Americans? In a random sample of 801 black Americans, 34% reported that there had been times in the last year when they had not been able to afford medical care.
Test an appropriate hypothesis and state your conclusion. (Make sure to check any necessary conditions and to state a conclusion in the context of the problem.)
What is the sample proportion and standard deviation?