It is all the way simplfyed all the way, I hope that that answers your question☻
Answer:
The interval from the sample of size 400 will be approximately <u>One -half as wide</u> as the interval from the sample of size 100
Step-by-step explanation:
From the question we are told the confidence level is 95% , hence the level of significance is
=>
Generally from the normal distribution table the critical value of
is
Generally the 95% confidence interval is dependent on the value of the margin of error at a constant sample mean or sample proportion
Generally the margin of error is mathematically represented as
Here assume that
is constant so

=> 
=> 
So let
and 
=> 
=> 
=> 
So From this we see that the confidence interval for a sample size of 400 will be half that with a sample size of 100
B is the answer. Hope I helped!!
Answer:
m = 1
Step-by-step explanation:
<u>Step 1: Add 14m to both sides</u>
-13m + 14m = 1 - 14m + 14m
<em>m = 1</em>
<em />
Answer: m = 1
Plug in 2.5 for x and you get
2.5+1 which equals 3.5