maths Flashcards
1
Q
percentage change =
A
difference / original x 100
2
Q
magnification =
A
image size / object size
3
Q
Rf =
A
solute distance / solvent distance
4
Q
SA:VOL =
A
SA / VOL
5
Q
cardiac output =
A
heart rate x stroke vol
6
Q
RQ =
A
CO2 produced / O2 consumed
7
Q
microorganism growth equation =
A
start population x 2^n
8
Q
Q10 =
A
R2 / R1
9
Q
how to calculate degrees of freedom for t test?
A
(n1 + n2) -2
10
Q
how to calculate degrees of freedom for chi squared
A
n-1
11
Q
what is always the null hypothesis ?
A
no significant difference between …
12
Q
state the sentence for rejecting Null
A
at 5%, 95% confident the difference is significant and not due by chance
13
Q
if t is greater than crit value …
A
reject null
14
Q
if chi squared equal or greater than crit …
A
reject null
15
Q
if chi squared smaller than crit value …
A
fail to reject null
