Answer:
For 99% of confidence interval is 67.5±1.3524
Step-by-step explanation:
Given:
Mean height =67.5 inches
Standard deviation:2.1 inches
Z at 99%.
No of samples 16.
To find:
confidence interval
Solution:
We have formula for confidence interval,
=mean ±Z*{standard deviation/sqrt(no.of observation)}
Now
Z=99%
has standard value as ,
Z=2.576
Confidence interval= mean±Z{standard deviation/sqrt(No. of samples)}
=67.5±2.57{(2.1/sqrt(16)}
=67.5±2.576(2.1/4)
=67.5±1.3524
Let x be the number.
Set up an equation:
2x - 2/3x = 20
Simplify:
1 1/3x = 20
Divide both sides by 1 1/3
X = 15
The number is 15
.438
rounded to nearest tenth = .4
rounded to nearest hundredth = .44
Answer:
4.5
Step-by-step explanation:
1 yard = about 1 meter
<h2>If you mean :</h2>
Inverse both sides
Multiply both sides by 4
Divide both sides by 3
_____________________________________________
<h2>If u mean : </h2>
Multiply both sides by the 3
Divide both sides by 4
