Answer
6.40%
Step-by-step explanation:
Sample size=n=250
sample proportion=p=0.4
95% confidence interval so significance level α=1-0.95=0.05
So, α/2=0.025
z_( α/2)=1.960 (value taken from statistic z-table)
use formula;
p(+/-)z_(α/2)square root(p(1-p)/n)
(0.4-1.960 sq.root(0.4(1-0.4)/250), 0.4+1.960 sq.root(0.4(1-0.4)/250))
(-0.2073,0.4607) (estimation of population proportion)
First you must reduce -4(2x-1) which is -8+4>5-3
on edge it's C. If Terrence samples 800 more people, his margin of error will be the same as Deena’s.
53
Why :
this is type of casework
- B can only be 1
so E = 4
9 x 1 x 10 x 10 x 1 = 900
and so, theres only one possible.
