Answer: C. 461
Step-by-step explanation:
We know that the formula to find the sample size is given by :-
, where 
= Population standard deviation from prior study.
E = margin of error.
z* = Critical value.
As per given , we have
E= 15
Significance level : 
Critical value (Two tailed)=
Now , Required sample size = 
[Round to next integer]
Hence, the required sample size to be taken is 461.
Correct answer = C. 461
Im not sure but i thing its 0.5 or 1/2
cause if you take (3/1)*(1/6) that's what you will get
also you had to make 3 as a fraction so you would put the denominator as 1 so if you divide 1 and 3 you would still get the whole number as 3
Answer:
A. Yes.
B. Yes.
C. No.
Step-by-step explanation:
A. Yes. The sum of the series, 
is the sum of a geometric series.
The first term of the series 
= 5.
The common ration or the ratio between successive terms (r) = 
(Answer)
B. Yes. The sum of the series, 
is also the sum of a geometric series.
The first term of the series 
.
The common ration or the ratio between successive terms (r) = 
(Answer)
C. No. The sum of the series, 
is not the sum of a geometric series.
The first term of the series 
.
(Answer)
Answer:
Yes the sample can be use to make inference
Step-by-step explanation:
The inference is possible if the conditions:
p*n > 10 and q*n > 10
where p and q are the proportion probability of success and q = 1 - p
n is sample size
Then p = 12 / 30 = 0,4 q = 1 - 0,4 q = 0,6
And p*n = 0,4 * 30 = 12 12 > 10
And q*n = 0,6 * 30 = 18 18 > 10
Therefore with that sample the conditions to approximate the binomial distribution to a Normal distribution are met
