Biology statistical tests and formulas

What is the hard Weinberg formulas? For allele and gene frequency

2p+pq²+2q=1

p+q=1

Formula for mitotic index

MI=number cells undergoing mitosis/total number of cells in view

What does it mean when error bars (STANDARD deviations) overlap In bar charts?

No significant difference between X and y axis

What does it mean if there are no overlaps in error bars

There is a significant difference between X and Y

Formula for percentage ERROR

Uncertainty/mean value X 100

What do the points where the lines overlap mean?

The rate of photosynthesis and the rate of respiration is the same

What is the formula for the area of a circle?

πr2

What is the formula for a circumference of a circle

2πr

What is the formula for the SA of a cylinder?

What is the formula for the volume of a cylinders

2πr² x L

What is the formula for the surface area of a sphere?

4πr²

What is the formula for the volume of a sphere?

4/3πr³

What is the definition of standard deviation?

A measure of how spread out your repeats are from the mean

Why is standard deviation better than the range? (3 marks)

The range only shows the difference between the highest and lowest value.

Standard deviation shows the measure of how spread out your repeats are from the mean

SD reduces the effect of anomalies

SD can be used to show their the difference between results is significant

What is the formula for cardiac out put

Cardiac output= heart rate x stroke volume

Heart rate is (beats per minute^-1 )

Stroke volume is the volume of blood that leaves the heart per beat in (dm³)