Maths/Graphs/Data

Question 1

What is a correlation coefficient?

Answer 1

A numerical value between -1 and +1 for how strong the correlation is.
The closer to -1 or +1 the stronger the correlation, 0 = no correlation

Question 2

What can the correlation coefficient tell you about the relationship between two variables?

Answer 2

How closely related they are. For example if value close to -1 or +1 then variable = very closely related. This will also be shown by points being very close to the line of best fit.

Question 3

What is the standard form of micro? and what does the symbol look like?

Answer 3

µm = 10^-6

Question 4

What is standard form of nanometres and what is the symbol?

Answer 4

nm and 10^-9

Question 5

Give the equation used to calculate stock or dilution solution concentrations/volumes

Answer 5

V1 =  C2 * V2 / C1
1= stock solution 2 = diluted solution