Answer:
Margin of error of 0.0485 hours.
Step-by-step explanation:
We have that to find our 
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of 
.
That is z with a pvalue of 
, so Z = 1.96.
Now, find the margin of error M as such
In which 
is the standard deviation of the population and n is the size of the sample.
In this question:
The margin of error is of:
Margin of error of 0.0485 hours.
You have to draw a pie graph.
The first piece (with the straight angle) cuts the pie in half.
The second piece cuts the remaining half in halves (making a quarter).
The third and fourth pieces are the same as each other. So they must each have an angle of 45 degrees. Each of these is an eighth of the total pie.
Should be fairly easy. Good luck!
Answer:
Step-by-step explanation:
Answers only, no estimates:
1.) 15/32
2.) 2
3.) 32
