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KonradZuse
Group Title
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 185
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 Pvalue 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.
 one year ago
 one year ago
KonradZuse Group Title
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 185 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 Pvalue 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.
 one year ago
 one year ago

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KonradZuse Group TitleBest ResponseYou've already chosen the best response.0
@jim_thompson5910
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
what did you get for the first part
 one year ago

KonradZuse Group TitleBest ResponseYou've already chosen the best response.0
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....
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
D is out because you're not testing p^, you're testing p
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
how are you getting 51% ? the given percentage is 44%
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
oh i see, you divided 615/1205 = 0.51, but that's p^ and NOT p
 one year ago

KonradZuse Group TitleBest ResponseYou've already chosen the best response.0
I meant C?
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
you did eh? lol yeah C is correct
 one year ago

KonradZuse Group TitleBest ResponseYou've already chosen the best response.0
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.
 one year ago

KonradZuse Group TitleBest ResponseYou've already chosen the best response.0
Would the next part be B?
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
you first need to find the test statistic
 one year ago

KonradZuse Group TitleBest ResponseYou've already chosen the best response.0
hmm....
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
use the formula z = (m  p)/(sqrt(pq/n)) where m is the test statistic and q = 1p 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
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
now you need to find P(z > 4.92108) and double this result
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
you can get away without even using a calculator though because notice how far z = 4.92108 is from z = 0
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
so what's the p value
 one year ago

KonradZuse Group TitleBest ResponseYou've already chosen the best response.0
not b hmm? A?
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
what did you get for the pvalue, which numeric value did you get
 one year ago

KonradZuse Group TitleBest ResponseYou've already chosen the best response.0
not sure....
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
calculate P(z > 4.92108), what do you get
 one year ago

KonradZuse Group TitleBest ResponseYou've already chosen the best response.0
How do we calculate that again without the table?
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
type normalcdf(4.92108, 10) into wolfram alpha
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
or you can use a TI calculator to do the same thing
 one year ago

KonradZuse Group TitleBest ResponseYou've already chosen the best response.0
hm.... Now the le end poin is almos 5, but the oher bnumbers are super tiny
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
so that means what
 one year ago

KonradZuse Group TitleBest ResponseYou've already chosen the best response.0
A or D.
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
why A
 one year ago

KonradZuse Group TitleBest ResponseYou've already chosen the best response.0
Well like I said I wasn't sre if it was the 5 or tiny #'s.. So D then :)
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
well the p value is very very small, so it has to be less than 0.01
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
the p value is the 4th value down
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
well you double it first, but still, it's very small
 one year ago
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