3 years ago

A circle has a circumference of 1π. What is the diameter of the circle?

1 answer:

6 0

The formula for circumference is 2* $\pi$ *r, and the formula for diameter is 2*r. So this means that if we divide the circumference by $\pi$ , we would have the answer to the diameter. In this case 1 $\pi$ divided by $\pi$ is 1.

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We have the sample size, sample mean and the sample standard deviation. Since the population standard deviation is not know, we will use t-distribution to find the confidence interval.

The critical t value for 95% confidence interval and 63 degrees of freedom is 1.998.

The 95% confidence for the population mean will be:

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Thus, the 95% confidence interval for the population mean will be (115,123)

So, option A is the correct answer

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