GI: Investigating Variation Flashcards
1
Q
Why should your sample be random?
A
to avoid bias
2
Q
Why should results be analysed statistically?
A
To ensure variation observed isn’t just down to chance
3
Q
Standard deviation
A
Measures the spread of values about the mean
4
Q
Large standard deviation =
A
Varied sample
5
Q
How can standard deviations be plotted?
A
Using error bars
6
Q
What do error bars extend?
A
One standard deviation above and one standard deviation below the mean
7
Q
Longer error bar = ?
A
Larger standard deviation = more spread out the sample data is from the mean
