Mann Whitney

Question 1

tests for

Answer 1

significant differences between two sets of data

Question 2

example of null hypothesis

Answer 2

there is no difference between the size of the bed load at site 1 and site 8

Question 3

example of an alternative hypothesis

Answer 3

there is a difference between bed load size at site 1 and site 8

Question 4

method

Answer 4

• rank two sites as if they are one data set
• sum the ranks separately
• put figures into 2 equations
• take the lower of the 2 answers and test for significance on the table

Question 5

Sample size/range

Answer 5

must be at 2 different locations

Question 6

advantages

Answer 6

• can handle sample of very different sizes

- handle large data sets

Question 7

disadvantages

Answer 7

-takes time to calculate

Question 8

findings at sabden brook

Answer 8

95% accepted that difference in bedload at site 1 and site 8