The confidence interval for standard deviation is different than that for mean in that the point estimate for the standard deviation ________.
A)is calculated as plus or minus the standard error.
B)is closer to the left endpoint of the confidence interval.
C)is the square of the point estimate for the variance.
D)is closer to the right endpoint of the confidence interval.

Question

Quizplus · Accepted Answer

The point estimate for the standard deviation is calculated as the sample standard deviation. Unlike the point estimate for the mean, the point estimate for the standard deviation is not typically located at the midpoint of the confidence interval. It may be closer to either the left or right endpoint of the interval, depending on the shape of the distribution and the spread of the data. Therefore, choice B is correct. Choices A and C are incorrect because they do not accurately describe the calculation of the point estimate for the standard deviation. Choice D is also incorrect because it makes a generalization that does not apply in all cases.

The Confidence Interval for Standard Deviation Is Different Than That