CH3202 Quiz 1

◦Set of results appears to differ unreasonably from the others in the set called a/an ________________________.

• Standard Deviation

• Outlier

• Mean

• Accuracy

◦What are the two (2) types of ISO recommended test for outlier detection?

• Grubb's Test

• Repeatability Test

• Dixon's Test

• Reproducibility Test

◦What are the sample size for Grubb’s test (G-test)?

• 3 to 7

• 7 to 10

• 4 to 7

• 3 to 10

What are the sample size for Dixon’s test (Q-test)?

• 3 to 7

• 3 to 10

• 7 to 10

• 4 to 7

◦The following values were obtained for nitrate concentration (mg/L) in a sample of pond water:

◦

  0.580  0.607  0.527  0.598  0.480  0.538  0.554  0.570

What test(s) should we use for outlier detection?

• Repeatability Test

• Grubb's Test

• Dixon's Test

• Reproducibility test

◦The following values were obtained for nitrate concentration (mg/L) in a sample of pond water:

◦

  0.580  0.607  0.480  0.538  0.554  0.570

What test(s) should we use for outlier detection?

• Grubb's Test

• Repeatability Test

• Dixon's Test

• Reproducibility Test

◦The data below give the values of fasting glucose concentration (mmol/L) of the blood of volunteers.

◦

   4.1  4.5  6.5  5.2  5.5

Identify if 6.5 mmol/L is an outlier? Show your working on paper.

Given mean = 5.16 and standard deviation = 0.9317

• Yes

• No

• Not sure

◦The data below give the concentration of thiol (mM) in the blood lysate of the blood of volunteers.

   1.84  1.90  1.79  1.93  1.87  1.73  1.82  2.18

Identify if 2.18 mM is an outlier? Show your working on paper.

Given mean = 1.883 and standard deviation = 0.13562

• Yes

• No

• Not sure

◦Ikhwan performed 5 titration value in mL:

   18.2  16.3  17.9  18.0  17.8 

Identify if 16.3 mL is an outlier? Show your working on paper.

• Yes

• No

• Not sure