Counting Errors and Statistics 2.03

By minimizing potential error present, we improve __________?

A sample has a gross count rate of 235 with a count time of 5 minutes. Find the standard deviation of a single count.

See above

Quality Control documentation are used to track performance and inform operators of completion of daily checks

Chi-squared is used to determine the precision of a counting system.

See above

By maintaining planchets clean and as free from contamination sample result reliability will be increased

WP 12HP1245 Tennelec is the only instrument using a chi-squared test at WIPP

Planchets and carriers should be inspected, clean and counted _________?

Voltage plateau is a graph that indicates a detector’s response to an isotope with variations of high ________?

This limit is a factor of both the instrumentation and technique/procedure being used.

Poisson distribution is valid when the probability of success is large

The amount of scatter of data points around the mean.

Time that must elapsed after a detector pulse is counted before another full-size pulse can be counted

See above

Given that both rates (cpm and dpm) are in the same units of time ____________ then can be determined.

Counting errors result from the positioning of the sample in a relation to the detector.

Increasing the background count time is one way to lower the ________?

Define the following term: Mean

Emitted radiation traveling away from the detector is reflected, or scattered back to the detector.

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See above

___________ is the square root of the variance.

Large amount of material on the sample media, it could introduce a counting error due to ______________?

Counting statistics are used to serve as a check on the the normal functioning of the counting equipment.

_______ is the radiation that enters the detector concurrently with the radiation emitted from the sample being analyzed

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Counts that fall outside the warning limits indicate that something COULD be wrong.

The format above identifies what?

See above

How long does it take the HP1245 Tennelec to run a background?