Answered: A national survey showed that Hillshire…

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 19PFA

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Question

A national survey showed that Hillshire Farm Deli Select cold cuts were priced, on the average, at $5.20 per pound. Suppose a national survey of 23 retail outlets was taken and the price per pound of Hillshire Farm Deli Select cold cuts was ascertained. If the following data represent these prices, what is a 90% confidence interval for the population variance of these prices? Assume prices are normally distributed in the population.

5.18	5.22	5.25	5.19	5.30
5.17	5.15	5.28	5.20	5.14
5.05	5.19	5.26	5.23	5.19
5.22	5.08	5.21	5.24	5.33
5.22	5.19	5.19

Appendix A Statistical Tables

(Round the intermediate values to 7 decimal places, e.g. 25.3162945. Round your answers to 4 decimal places, e.g. 25.3162.)

enter the lower value of the interval ≤ σ² ≤ enter the upper value of the interval

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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