Here's the question you clicked on:
KonradZuse
In 1965, about 44% of the U.S. adult population had never smoked cigarettes. A national health survey of 1205 U.S. adults (presumably selected randomly) during 2006 revealed that 615 had never smoked cigarettes. Reference: Ref 18-5 Suppose you wished to test whether there has been a change since 1965 in the proportion of U.S. adults that have never smoked cigarettes. Which of the following are the appropriate hypotheses? A. H0: p = 0.44, Ha: p > 0.44 B. H0: p = 0.51, Ha: p 0.51 C. H0: p = 0.44, Ha: p 0.44 D. H0: = 0.44, Ha: 0.44 The P-value of the test of hypotheses is A. greater than 0.10. B. between 0.05 and 0.10. C. between .01 and 0.05. D. below 0.01.
what did you get for the first part
I forgot to mention that there was a misprint when I pasted.. B is not equal, same with C, and then there is a p ^ for both of D's answers... I think it's B....
D is out because you're not testing p^, you're testing p
how are you getting 51% ? the given percentage is 44%
oh i see, you divided 615/1205 = 0.51, but that's p^ and NOT p
you did eh? lol yeah C is correct
Haha I glanced over them didn't realize that there were 2 of the same haha... I wanted the one that was not equal :D.
Would the next part be B?
you first need to find the test statistic
use the formula z = (m - p)/(sqrt(pq/n)) where m is the test statistic and q = 1-p z = (m - p)/(sqrt(pq/n)) z = (0.51037 - 0.44)/(sqrt(0.44*0.56/1205)) z = 4.92108 So the test statistic is z = 4.92108
now you need to find P(z > 4.92108) and double this result
you can get away without even using a calculator though because notice how far z = 4.92108 is from z = 0
so what's the p value
what did you get for the p-value, which numeric value did you get
calculate P(z > 4.92108), what do you get
How do we calculate that again without the table?
type normalcdf(4.92108, 10) into wolfram alpha
or you can use a TI calculator to do the same thing
hm.... Now the le end poin is almos 5, but the oher bnumbers are super tiny
so that means what
Well like I said I wasn't sre if it was the 5 or tiny #'s.. So D then :)
well the p value is very very small, so it has to be less than 0.01
the p value is the 4th value down
well you double it first, but still, it's very small