The Following Statements Are All Correct EXCEPT ________

question 21

Multiple Choice

The following statements are all correct EXCEPT ________.

• A) some systems monitor EGR operation by using a pressure feedback EGR sensor
• B) a potentiometer is used to determine EGR valve position on many OBD-II systems
• C) low restriction exhaust systems will have no effect on EGR system operation
• D) the PCM controls vacuum applied to vacuum operated EGR valves

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Definitions:

Sampling Distribution

How likely different outcomes of a statistic are, based on data collected randomly.

T-statistic

A type of statistic used in hypothesis testing, calculated from sample data to assess the strength of the evidence against the null hypothesis.

Z-score

A Z-score is a statistical measurement describing the number of standard deviations a data point is from the mean of a data set, used in standardizing data and for hypothesis testing.

Theoretical Distribution

A mathematical function that represents the possible values and their associated probabilities of a random variable.