Answer:
A sample of 3851 is required.
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 Z-table as such z has a p-value of .
That is z with a pvalue of , so Z = 2.327.
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.
Variance is 5.76 kWh
This means that 
They would like the estimate to have a maximum error of 0.09 kWh. How large of a sample is required to estimate the mean usage of electricity?
This is n for which M = 0.09. So
Rounding up:
A sample of 3851 is required.
The perimeter is 3 times the length of each side:
p = 3s
If the perimeter is at most 45 cm, then
p ≤ 45 cm
3s ≤ 45 cm
45 cm
s ≤ —————
3
s ≤ 15 cm
So each side is at most 15 cm.
I hope this helps. =)
To find the mean absolute deviation of the data, start by finding the mean of the data set.
Find the sum of the data values, and divide the sum by the number of data values.
Find the absolute value of the difference between each data value and the mean: ...
Find the sum of the absolute values of the differences
Answer:
The perimeter of the dog run will use 67.2 feet of fencing.
Step-by-step explanation:
First find how long the width is.
24 * 2/5 = 9.6
The width of the fence is 9.6 feet.
To find the total perimeter, add double the length and width.
24 * 2 = 48
9.6 * 2 = 19.2
48 + 19.2 = 67.2
Answer: 0.87
Step-by-step explanation:
Its the closet i can get
