Write three equivalent ratios for the given ratio. 6 9
1 answer:
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Answer:
The circumference of the yellow circle is or
approximately, the circumference of the blue circle is
or
approximately, the circumference of the green circle is
or
approximately, the circumference of the red circle is
or
approximately, and the circumference of the pink circle is
or
approximately.
Step-by-step explanation:
To find the circumference of a circle, you need to multiply the diameter of the circle and multiply it by . In this case, the circumferences of the yellow circle are
or approximately
, the circumference of the blue circle is
or approximately
, the circumference of the green circle is
or approximately
, the circumference of the red circle is
or approximately
, and the circumference of the pink circle is
or approximately
.
<h3>Answer: Choice B</h3>
No, this is not a plausible value for the population mean, because 5 is not within the 95% confidence interval.
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Explanation:
The greek letter mu is the population mean. It has the symbol which looks like the letter 'u' but with a tail at the front or left side.
The question is asking if mu = 5 is plausible if the researcher found the 95% confidence interval to be 5.2 < mu < 7.8
We see that 5 is <u>not</u> in that interval. It's a bit to the left of 5.2
Since mu = 5 is not in the interval, it's not a plausible value for the population mean.
Have we ruled it out with 100% confidence? No. Such a thing is not possible. There's always room for (slight) error. The researcher would need to do a census to be fully confident; however, such practices are very time consuming and expensive. This is the main reason why statistics is important to try to estimate the population with a sample.