X-double bar is best described as:
a. An unbiased smaller sample of a larger population used to represent the entire population.
b. the average of a series of numbers.
c. the average of the subgroup averages.
d. the average of the subgroup averages.
Answer: D
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Ammeters are always placed in ____________________ with the device being checked.
Fill in the blank(s) with the appropriate word(s).
Which number is less: -7.0 or 7.1?
A) -7.0 B) 7.1
After replacing a gauge, the isolation valve should be ________
A) removed and replaced with a hydraulic valve B) replaced every time, in case it has undetectable internal damage C) opened very carefully to prevent damaging the gauge with sudden pressure D) opened fully to check calibration of the gauge and quickly restore pressure to the line
In the number 3,567,890, the digit 9 is in the hundreds place.
Answer the following statement true (T) or false (F)