Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
3 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
Which precautions should be considered when measuring the turbidity of water? |
Discard scratched or next sample tubes. Fill the tubes with samples and standards that have been agitated thoroughly, and allow sufficient time for bubbles to escape. Sample tubes must be kept scrupulously clean, both inside and out. Turbidity of a sample can change after the sample is collected and shaking the sample will not recreate the original turbidity. Turbidity should be measured in a sample as soon as possible to obtain accurate results. |
|
|
|
Results from MPN test during one week were as follows 4, 7, 14, 8, 9, 15, 12. What is the mean MPN / 100 milliliter from the data? Select the closest answer. |
Add them up / 7 days in the week |
Average people are mean. Average is add them up / total. |
|
|
What is the median MPN per 100 milliliters from the data? Select the closest answer. Rearrange data ascending 4, 7, 8, 9, 12, 14, 20. |
9 is in the middle or the median there are three lower and 3 higher |
Median is middle |
