Answered: Test a claim that the mean amount of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

Test a claim that the mean amount of lead in the air in U.S, cites is less than 0.087 microgram per cubic meter. it was found that the mean amount of lead in the air for the random sample of 58 US, ottes is OCSS microgram per cubic meter and the standard deviation is 0.068 microgram per cudie meter. At a = 0. 10, can the claim be supported? Complete parts (a) through (e) below. Assume the population is nomally distributed. (b) Find the critical value(s) and identify the rejection region(s). The critical value(s) is/are t0=______(Use a comma to separate answers as needed. Round to two decimal places as needed.) (c) Find the standardized test statistic, t. The standardized test statistic is t=______(Round to two decimal places as needed.) (d) Decide whether to reject or fail to reject the null hypothesis. (Reject ,Fail to reject)_____H0 because the standardized test statistic_______(is ,is not), in the rejection region. (e) Interpret the decision in the context of the original claim. There______(is, is not), enough evidence at the ___ % level of significance to ____(reject, support) the claim that the mean amount of lead in the air in U.S. cities is _______( less than, greater than or equal, equal, not equal, less than or equal, greater than) ____(Type integers or decimals. Do not round.) microgram per cubic meter.