Data Test

Question 1

Formula for Absolute Uncertainty

Answer 1

           2

Question 2

Formula for Relative Uncertainty

Answer 2

absolute uncertainty
——————————- x 100
measurement

Question 3

Changing Relative to Absolute

Answer 3

relative uncertainty
———————————- x value
100

Question 4

Calculating the Mean

Answer 4

number of numbers

Question 5

Validity

Answer 5

Same as Accuracy - How close to a number or result the answer is

Question 6

Reliability

Answer 6

Same as Precision - how close the answers were

Question 7

Accuracy

Answer 7

Same as Validity - How close a number is to a result

Question 8

Precision

Answer 8

Same as Reliability - How close results are to eachother

Question 9

Extrapolate

Answer 9

Predictions made from outside the Upper pole and the lower pole of the data

Question 10

Interpolate

Answer 10

Predictions made from inside the Upper pole and the lower pole of the data

Question 11

Linear Trend

Answer 11

The data trend is moving upwards or downwards in a straight line

Question 12

Non-linear

Answer 12

The data trend is moving up and down

Question 13

No trend

Answer 13

There is no trend

Question 14

Standard Deviation

Answer 14

Start by finding the average of the data (x bar) then take the mean from each data point and square it. Add all the points up and take one away from the number of bits of data. Square root and you will get the answer

Question 15

Standard Error

Answer 15

square root of sample size

Question 16

Limitation

Answer 16

Something holding an experiment back

Question 17

instrumental error

Answer 17

when the instrument being used is inaccurate

Question 18

environmental error

Answer 18

when an environmental factor effects the result

Question 19

procedural error

Answer 19

when different procedures are used to answer the same question

Question 20

human error

Answer 20

limitations to human ability

Question 21

Random Error

Answer 21

Occurs due to chance - random

Question 22

Systematic

Answer 22

Gives measurements that are different every time, often due to instrumental error