Answer:
22.778%
Step-by-step explanation:
0.22778/1*100/100=22.778/100
The confidence interval is

.
We first find the mean. Add together all of the data points and divide by 6, the number of data points; the mean is 77.28.
Next we find the standard deviation. Find the difference between each data point and the mean; square it; find the sum; divide by the number of data points; take the square root. The standard deviation is 3.32.
To find the margin of error, we calculate the z-score associated with this level of confidence. 100-90 = 10% = 0.1; 0.1/2 = 0.05; 1-0.05 = 0.95. Using a z-table (http://www.z-table.com) we see that this is between two scores, 1.64 and 1.65; we will use 1.645.
The margin of error is given by
z * (σ/√n) = 1.645*(3.32/√6) = 2.23.
Thus the confidence interval is 77.28 +/ 2.23.
Answer:
The answer is A
Step-by-step explanation:
Hope this helps!
:)
9514 1404 393
Answer:
$3,840
Step-by-step explanation:
The interest formula can be rearranged to find the principal amount.
I = Prt
P = I/(rt) = $768/(.04·5)
P = $3,840
They originally borrowed $3,840.
Answer:143
Step-by-step explanation:
83
60
_
143