Refer to the Environmental Science & Technology (Sept. 1, 2000) study of ammonia levels near the exit
Question:
Refer to the Environmental Science & Technology (Sept. 1, 2000) study of ammonia levels near the exit ramp of a San Francisco highway tunnel, Exercise 2.30. The daily ammonia concentrations (parts per million) on eight randomly selected days during afternoon drive-time are reproduced in the table. Suppose you want to determine if the median daily ammonia concentration for all afternoon drive-time days exceeds 1.5 ppm.
a. Set up the null and alternative hypotheses for the test.
b. Find the value of the test statistic.
c. Find the p-value of the test.
d. Give the appropriate conclusion (in the words of the problem) if α = .05.
Data from Exercise 2.30
Three-way catalytic converters have been installed in new vehicles in order to reduce pollutants from motor vehicle exhaust emissions. However, these converters unintentionally increase the level of ammonia in the air. Environmental Science & Technology (Sept. 1, 2000) published a study on the ammonia levels near the exit ramp of a San Francisco highway tunnel. The data in the table represent daily ammonia concentrations (parts per million) on eight randomly selected days during afternoon drive-time in the summer of a recent year.
Step by Step Answer:
Statistics For Engineering And The Sciences
ISBN: 9781498728850
6th Edition
Authors: William M. Mendenhall, Terry L. Sincich