4. The proprietor of a clothing store in New York wants to study the average age of his customers. A random sample of 20 customers revealed an average age of 28 years with a standard deviation of 4 years. a). What is the point estimate of the true average age of all customers? b). Construct a 95% confidence interval (interval estimate) for the true average age of all customers. (Write the details) c). Interpret the meaning of the interval you computed in part (b).

4. The proprietor of a clothing store in New York wants to study the average age of his customers. A random sample of 20 customers revealed an average age of 28 years with a standard deviation of 4 years. a). What is the point estimate of the true average age of all customers? b). Construct a 95% confidence interval (interval estimate) for the true average age of all customers. (Write the details) c). Interpret the meaning of the interval you computed in part (b).

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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