Methods of reducing errors

How can systematic error be described in terms of data?

• Spread about the central value

• A translation from the true value

• No choice but to start again

• Easy to detect

What is one method to reduce contamination in chemical analysis?

• Use of external standards

• Cleanliness

• Calibration

• Reagent blank

What is one method mentioned for reducing systematic errors?

• Random sampling

• Agreed protocols

• Increasing sample size

• Ignoring outliers

What is the primary goal of increasing the sampling size?

• To increase the mean

• To reduce random errors

• To increase variability

• To decrease the mean

What is the relationship between sample size and standard error?

• Directly proportional

• Inversely proportional

• No relationship

• Exponentially related

What are two different sorts of blanks?

• Process

• Null

• Reagent

• Sample

A type of scatter plot to compare two measurements is called a ______ plot

For analytical instruments and field samples, which is likely to have the largest source of error?

• Analytical instruments

• Field samples