Maths

Question 1

Standard deviation

Answer 1

Deviation from mean

Use whenever mean used

Question 2

Spearman rank

Answer 2

Works out correlation on skater graph

Closer to 1 = coordinates closer to line

Question 3

Chi square

Answer 3

Used in categorical all data (bar graphs)
If any significant difference between observed and predicted
Degree freedom: N-1

Question 4

Chi squared ecological

Answer 4

Larger value than critical = significant difference

Question 5

Chi squared genetics

Answer 5

Smaller value than critical = no significant difference (theory correct)

Question 6

T-test

Answer 6

Any significant difference between two means

Question 7

T test paired

Answer 7

Two different measurements on same individual

Length and width of a leaf

Question 8

T-test unpaired

Answer 8

Same measurement taken from different groups

Question 9

T test degree of freedom

Answer 9

Measurements - 1

Question 10

Two tailed hypothesis

Answer 10

Non-specific hypothesis

There is a significant difference in weight between boys and girls