The image below is a triangle drawn inside a circle with center O: Which of the following expressions shows the area, in square
inches, of the circle? 3.14 •2 3.14 • 3 3.14 • 2² 2 • 3.14 • 2²
2 answers:
Answer:
Option B is correct that is 3.14 . 2²
Step-by-step explanation:
We are given a figure of circle with center O.
From figure.
Length of the diameter of the circle = 4 inches.
⇒ Radius of the circle, r = 4 /2 = 2 inches.
Area of the circle is given by following formula,
by putting value of π = 3.14 and radius, r = 2
we get,
Therefore, Option B is correct that is 3.14 . 2²
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Answer:
The confidence interval for the mean is given by the following formula:
(1)
For this case the confidence interval obtained is: (23.6 ; 27.3)
And the best interpretation would be:
We have 95% of confidence that the true mean os ages of women who apply for marriage licenses in his county is between 23.6 and 27.3
Step-by-step explanation:
Previous concepts
A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".
The margin of error is the range of values below and above the sample statistic in a confidence interval.
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
represent the sample mean for the sample
population mean (variable of interest)
s represent the sample standard deviation
n=94 represent the sample size
Solution to the problem
The confidence interval for the mean is given by the following formula:
(1)
For this case the confidence interval obtained is: (23.6 ; 27.3)
And the best interpretation would be:
We have 95% of confidence that the true mean os ages of women who apply for marriage licenses in his county is between 23.6 and 27.3