Measurement and data reliability Flashcards Preview

The Medicine (Y2) > Measurement and data reliability > Flashcards

Flashcards in Measurement and data reliability Deck (10):
1

What are the 3 types of errors that affect the validity of analytical measurement?

Indeterminate (random error)
Determinate (systematic error)
Gross error - big mistake

2

Random error affects precision more than accuracy. True or false?

True

3

Systematic error affects accuracy more than precision. True or false?

True

4

What is meant be precision?

How close two values are to each other

5

What is meant by accuracy?

How close value is to the true value

6

Standard deviation gives an idea about how far results are spread from a mean value. True or false?

True

7

What are the origins of systematic error?

Instrumental
Personal error
Method

8

Null hypothesis assumes no bias. True or false?

True

9

What is the t-test used for?

To calculate confidence intervals of a measurement when the population SD is not known - usually when there is a limited number of data points

10

Biological essays are difficult to validate so should be left alone as they are in BP. True or false?

True