Introduction to Data + Statistics

Question 1

What %(w/v) mean?

Answer 1

percentage ( weight [grams] / volume [millilitre] )

Question 2

What are angstrom units used for?

Answer 2

These are used two express wavelengths and interatomic distances.
1 angstrom unit depicts 10 to the power -10 OR 0.1nm

Question 3

What is the dilution factor equation?

Answer 3

volume 1 / volume 1 + 2

Question 4

How do you work out the final concentration?

Answer 4

original concentration x dilution factor

Question 5

What is quantitative data?

Answer 5

Values which are numbers.

Question 6

What is qualitative data?

Answer 6

Values which aren’t numbers.

Question 7

What are the 2 categories within quantitative data?

Answer 7

Quantitative Variables

Categorical Variables

Question 8

What does Quantitative Variables mean?

Answer 8

Numbers which mean something in the real world.
Thus, discrete and continuous.
Discrete being numbers and Continuous being ratios.

Question 9

What does Categorical Variables mean?

Answer 9

Numbers which assign participants to groups.
Thus, nominal and ordinal.
Nominal being types and ordinal being levels.

Question 10

What can qualitative data include?

Answer 10

• Words / Text
• Photographs
• Videos
• Maps
  Taste / Smell / Touch.

Question 11

What does analysis of data allow?

Answer 11

Analysis of data allows decisions to be made from the data.

• Identifies patterns.
• Assigns a level of probability.

Question 12

What are the 4 different types of data?

Answer 12

• Structured Data
• Unstructured Data
• Semi - structured Data
• Metadata

Question 13

What is structured data?

Answer 13

Tabular format (excel spreadsheet)
Pre - defined data model
Easy to analyse

Question 14

What is unstructured data?

Answer 14

No pre - defined data model

IE: IMAGES

Question 15

What is semi - structured data?

Answer 15

Data which isn’t in formal data structure.

Has tags / markers that humans and computers can read it.

Question 16

What is metadata?

Answer 16

Data which describes and gives information about other data.

Question 17

What is statistics?

Answer 17

Scientific discipline = Collection / Classification / Analysis / Interpretation of data.
Imposes order and regularity via probability.

Question 18

Describe the statistical cycle.

Answer 18

Formulate the question.
Collect the data. 
Analyse the data.
Interpret the results.
REPEAT THE CYCLE.