1) Define: Precision

2) What kind of error do precise measurements have?

1) refers to reproductablilty or how close measurements are to one another

2) Precise measurements have low random error

1) Define: Accuracy

2) What tipe of error do accurate measurements have?

1) refers to how close a measurement is to the actual value

2) low systematic error and generally low random error

1) Define: Systematic Error

2) How can this be avoided?

1) produces values that are either all higher or all lower than the actual value

2) can be avoided by calibrating measurement devices

1) Define: Random Error

2) How can it be avoided?

1) produces values that are both higher and lower than the actual value

2) it can't be completely avoided but it varies in size

1) make sure there is a decimal point

2) move from left to right until you hit the first non-zero

3) count that didgit and every digit to its right

*note: if right most digit is a zero and there is no decimal point, it is not significant*

Significant Figures:

Multiplication and Division Rules

Significant Figures:

Addition and Subtraction

Rounding rules when ending in 5

ex. round 46.35 and 102.25 to the tenths place

"round to the evens"

if # before 5 is even, round down

if # before 5 is odd, round up

ex. 46.4 and 102.2