Answer:
(29.13, 30.07)
Step-by-step explanation:
The first step is finding 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 
.
So it is z with a pvalue of 
, that is between 
and 
, so we use 
.
Now, find M as such:
In which 
is the standard deviation and n is the length of the sample
The lower end of the interval is the sample mean subtracted by M. So it is 29.6 - 0.47 = 29.13 hours.
The upper end of the interval is the sample mean added to M. So it is 29.6 + 0.47 = 30.07 hours
The 90% confidence interval is (29.13 hours, 30.07 hours).
The correct answer is:
(29.13, 30.07)
Answer:
Step-by-step explanation:
Y=3x-4
Slope of this line = 3
Slope of the line parallel to this line = 3 {slope of parallel lines are equal}
Slope of the line perpendicular to this line = -1/3 {product of the slope of perpendicular lines= -1}
Answer:
slope= m=-30 hope that helps
Answer:
$19.70 OR $58.30
Step-by-step explanation:
I say either or because I can't see the answer choices.
Its either adding or subtracting from the one backpack we know is $39.00
If we know the difference between the two is 19.30
39.00+19.30 = 58.30
39.00-19.30= 19.70
See if either of those are available :) Hope this helps! :)
Answer:
52=x-15(being vertically opposite angle)
52+15=x
x=67
