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Automotive Technology: A Systems Approach (MindTap Course List)
6th Edition
ISBN:9781133612315
Author:Jack Erjavec, Rob Thompson
Publisher:Jack Erjavec, Rob Thompson
Chapter34: Emission Control Diagnosis And Service
Section: Chapter Questions
Problem 5RQ: Explain why the I/M 240 and similar tests are being replaced by the OBD II system test.
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7 A random study was conducted on the shop floor to findout the percentage of idle
time.1000 observations were taken and at 250 times the machines were find idle.
Calculate number of observations necessary to obtain the desired results assuming
95% confidence level and ±5% accuracy.
Transcribed Image Text:7 A random study was conducted on the shop floor to findout the percentage of idle time.1000 observations were taken and at 250 times the machines were find idle. Calculate number of observations necessary to obtain the desired results assuming 95% confidence level and ±5% accuracy.
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