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KonradZuse
 2 years ago
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.
KonradZuse
 2 years ago
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.

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jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.1what did you get for the first part

KonradZuse
 2 years ago
Best ResponseYou've already chosen the best response.0I 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....

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.1D is out because you're not testing p^, you're testing p

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.1how are you getting 51% ? the given percentage is 44%

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

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.1you did eh? lol yeah C is correct

KonradZuse
 2 years ago
Best ResponseYou've already chosen the best response.0Haha I glanced over them didn't realize that there were 2 of the same haha... I wanted the one that was not equal :D.

KonradZuse
 2 years ago
Best ResponseYou've already chosen the best response.0Would the next part be B?

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.1you first need to find the test statistic

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.1use 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

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.1now you need to find P(z > 4.92108) and double this result

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

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.1so what's the p value

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.1what did you get for the pvalue, which numeric value did you get

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.1calculate P(z > 4.92108), what do you get

KonradZuse
 2 years ago
Best ResponseYou've already chosen the best response.0How do we calculate that again without the table?

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.1type normalcdf(4.92108, 10) into wolfram alpha

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.1or you can use a TI calculator to do the same thing

KonradZuse
 2 years ago
Best ResponseYou've already chosen the best response.0hm.... Now the le end poin is almos 5, but the oher bnumbers are super tiny

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.1so that means what

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

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.1well the p value is very very small, so it has to be less than 0.01

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.1the p value is the 4th value down

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.1well you double it first, but still, it's very small
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