Answer:
Step-by-step explanation:
Confidence intervals are constructed to estimate an unknown parameter of the population. This is usually population mean and sometimes, population standard deviation.
Since we are dealing with proportion, then the sample proportion would be used to determine the population proportion
Therefore, the pieces of information that the surveyor requires in order to construct the confidence interval are
a. the exact size of the sample that is surveyed
b. the proportion of people in the sample with the characteristic
d. the level of confidence desired
In order to solve, the sample, p proportion is determined.
p = number if people in the sample with the characteristic/ number of sample
q = 1 - p
Margin of error = z × √pq/n
Confidence interval = p ± margin of error
Answer: 300 cubic inches
Explanation:
Imagine slicing the T shape into two pieces such that we have two rectangular blocks.
- The larger block down below has volume of 3*12*5 = 180 cubic inches.
- The smaller block on top has volume of 8*3*5 = 120 cubic inches
The overall volume of this T shape is 180+120 = 300 cubic inches.
Answer:
270ft^2
Step-by-step explanation:
we need to multiply the terms given
15feet*18feet
we know feet*feet=
=ft^2
and
15*18=270
finally we have
270
=270ft^2