experiment 1: statical analysis

Question 1

the measurement of the samples must provide useful data, where their _____ and _____ are evaluated

Answer 1

accuracy and precision

Question 2

what are the statical parameters commonly used in data treatment

Answer 2

measures of control tendency
measures of accuracy
measures of precision

Question 3

this provides measures of the uncertainty associated with the central results

Answer 3

measures of central tendency

Question 4

in measures of central tendency, chemist uses ___ to ___ replicates of measurements the central is called…

Answer 4

2 to 5best or representative

Question 5

it is the average of the data. it is calculated by adding up the data and dividing the sum to the number of measurements made.

Answer 5

mean

Question 6

the middle results when the set of data is arranged in increasing order

Answer 6

median

Question 7

this provides a measures of the uncertainty associated with the central value obtained

Answer 7

measures of precision

Question 8

it is defined as the closeness of the results obtained which were measured in exactly the same way

Answer 8

precision

Question 9

it is the difference between the highest and lowest value in a set of measurement. it is used for small no. of measurements

Answer 9

range

Question 10

range expressed in relative terms. the range is divided to the mean and multiplied by 1000

Answer 10

relative range

Question 11

this is the average of the individual deviations from the mean, divided by the mean

Answer 11

average deviation

Question 12

it is used for obtaining scatter due to random error

Answer 12

variance

Question 13

it is the square root of variance

Answer 13

standard deviation

Question 14

it is the relative value of standard deviation

Answer 14

coefficient of variation

Question 15

it is another relative value of standard deviation multiplied by 1000

Answer 15

relative standard deviation

Question 16

this provides the measures on the closeness to the true value and is expressed as error

Answer 16

measure of accuracy

Question 17

it is the difference between the measure value and the true value

Answer 17

absolute error

Question 18

the absolute error is divided by the true error and then multiply by 100 or 1000

Answer 18

relative error

Question 19

the confidence interval provides us the range where the true value lies

Answer 19

confidence limit

Question 20

this test is used when there is a questionable data . it determines whether the data may or may not be rejected

Answer 20

Q-test

Question 21

what is one way to minimize systematic errors in an experiment, especially if the experiment requires high accuracy

Answer 21

calibration

Question 22

what is the instrument used in this experiment

Answer 22

analytical balance

Question 23

what is the title of this experiment

Answer 23

statistical analysis