In 2005, a random sample of 100 recorded deaths in the United States showed an average life span of 71.8 years. Based on the past record, the standard deviation of the life span is 8.9 years. Test the hypothesis that the mean life span is greater than 70 years for the United States.

In 2005, a random sample of 100 recorded deaths in the United States showed an average life span of 71.8 years. Based on the past record, the standard deviation of the life span is 8.9 years. Test the hypothesis that the mean life span is greater than 70 years for the United States.

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 3GP

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In 2005, a random sample of 100 recorded deaths in the United States showed an average life
span of 71.8 years. Based on the past record, the standard deviation of the life span is 8.9 years.
Test the hypothesis that the mean life span is greater than 70 years for the United States.

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