L2

Question 1

Sensitivity

Answer 1

Minimum amount of X needed to record a positive result

Question 2

Specificity

Answer 2

A positive result only come from a truly positive sample

Question 3

There are ___ types of errors: ______

Answer 3

2;
Random: new error introduced with each measurement
Systematic: error that is consistently present

Question 4

A well designed experiment should its hypothesis being __ and __.

Answer 4

Testable;

Falsifiable

Question 5

Accuracy

Answer 5

How close a recorded value is to the true value

Question 6

Precision

Answer 6

How reliable you can measure a value

Question 7

in the calculation, one should round to the correct number of significant figures only at ____ to reduce errors brought in with ___.

Answer 7

the end of all calculations;

every round off step

Question 8

pH meter: the glass probe should be rinsed and stored in the buffer solution when __ and ___.

Answer 8

it needs to be stored for a period ;

between uses of different concentration or type of solutions

Question 9

scale: the scale should be zeroed/tared __ empty container before measurement.

Answer 9

with

Question 10

pipette: two types of pipettes includes __ and __

Answer 10

volumetric: measure just one set volume;
graduated: lines along length to determine volume;

Question 11

when using glass pipette, especially the graduated pipettes, one should always check the ___ before usage.

Answer 11

the way pipette is scaled;