Use technology to construct the confidence intervals for the population variance σ2 and the population standard deviation σ. Assume the sample is taken from a normally distributed population. c=0.90, s2=8.41, n=25 Question content area bottom Part 1 The confidence interval for the population variance is (Round to two decimal places as needed.) Part 2 The confidence interval for the population standard deviation is:

Use technology to construct the confidence intervals for the population variance σ2 and the population standard deviation σ. Assume the sample is taken from a normally distributed population. c=0.90, s2=8.41, n=25 Question content area bottom Part 1 The confidence interval for the population variance is (Round to two decimal places as needed.) Part 2 The confidence interval for the population standard deviation is:

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 26PFA

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Question content area bottom

Part 1

The confidence interval for the population variance is

(Round to two decimal places as needed.)

Part 2

The confidence interval for the population standard deviation is:

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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