Answer: 0.042
Step-by-step explanation:
Point estimate of the difference between the two population proportion 
:-
, where 
and 
are sample proportions.
Given : In 1991 survey , The proportion of adults were current smokers =25.6%
i.e. 
In 2003 survey , The proportion of adults were current smokers = 21.4%
i.e. =0.214
Then , the point estimate of the difference between the proportion of current smokers in 1991 and the proportion of current smokers in 2003 :-
Hence, a point estimate of the difference between the proportion of current smokers in 1991 and the proportion of current smokers in 2003= 0.042
Answer:
what in the world did the other person put lol
Step-by-step explanation:
Answer:gamesfff
Step-by-step explanation:
Answer:
2000
Step-by-step explanation:
6000 / 3 = 2000
Answer:
Mean = 910.2
Standard deviation = 12.8
Step-by-step explanation:
82% over the age of 25 are high school graduates.
A survey randomly selected students of certain country included 1110 who were over the age of 25 and 871 of them were high school.
n = 1110
p = 82% = 0.82
q = 1 - 0. 82
q = 0.18
Mean = np
= 1110*0.82
= 910.2
Standard deviation = √npq
= √ 1110*0.82*0.18
=√163.836
= 12.8
