6.1 Statistical Analysis

Question 1

Standard Deviation definition

Answer 1

The spread of data around the mean

Question 2

How much data falls within + or- -1 around the mean

Answer 2

68%

Question 3

How much data falls within + or- 2 around the mean

Answer 3

95%

Question 4

What do error bars do

Answer 4

Graphical representation of data which indicate the error or uncertainty of the data.

Question 5

What does a small SD mean

Answer 5

A small SD clustered around the mean means all the data is near the mean value so its accurate and reliable

Question 6

What does a large SD mean

Answer 6

A large SD means data is spread around the mean meaning the data is less reliable

Question 7

Coefficient of variation definition

Answer 7

The ratio of the standard deviation to the mean as a percentage

100x SD/MEAN

Question 8

T- TESTS

Answer 8

Require a minimum sample size of 10 and have a normal distribution of SD

For a result to be statistically significant the result must be less than 0.05

Question 9

T- TEST showing correlation between two things

Answer 9

Calculate the r2 value. Multiply r2 by 100 and you get the overlap of data.

Question 10

Does Correlation= A relationship

Answer 10

NO IT DOESNT just because there is a correlation doesn’t mean there’s a relationship between the two variables