Answer: 
Step-by-step explanation:
The confidence interval for population mean is given by :-

Given : Sample size :
, which is a large sample , so we apply z-test .
Sample mean : 
Standard deviation : 
Significance level : 
Critical value : 
Now, a confidence interval at the 95% level of confidence will be :-

Answer:
$266.72
Step-by-step explanation:
I dont know if this is right but anyways..
for one year a monthly payment would be $266.72
if you paid $266.72 a mont for 30 years to would be $7,000
I hope I did it right
1:2
Looking at the image, there are 2 grey squares and 1 black square. Since the question is asking how many black squares to grey squares, it would be a 1:2.
Answer: 0.1840
Step-by-step explanation:
The binomial probability formula :-
, here n is the number total of trials , p is the probability of getting success in each trial and P(x) is the probability of getting success in x trial.
Given : The probability of the community favored building a police substation in their neighborhood = 0.64
If 14 citizens are chosen, then the probability that exactly 8 of them favor the building of the police substation will be :-

Hence, the probability that exactly 8 of them favor the building of the police substation = 0.1840
Answer:
B

<em>A</em><em> </em><em>polyn</em><em>omial</em><em> </em><em>must</em><em> </em><em>have</em><em> </em><em>a</em><em> </em><em>constant</em><em> </em><em>which</em><em> </em><em>is</em><em> </em><em>absent</em><em> </em><em>in</em><em> </em><em>equation</em><em> </em><em>B</em>