!! required practical 7

Question 1

why do random sampling

Answer 1

too many individuals in a population to measure them all

Question 2

what do you measure in sampling experiment

and what must it be

Answer 2

a sub-population that must be representative (accurate)

Question 3

how to make sure a sub-population is representative

Answer 3

choosing the sample at random, to avoid bias

sample must be large, to minimise impact of anomalies

Question 4

step 1 of random sampling method

Answer 4

divide area into a grid pattern using a tape measure

Question 5

step 2 of random sampling method

Answer 5

use a random number generator to identify a coordinate

Question 6

step 3 of random sampling method

Answer 6

place quadrat on coordinate

Question 7

step 4 of random sampling method

Answer 7

count all individuals in quadrat

Question 8

step 5 of random sampling method

Answer 8

repeat until you have a large sample size (at least 10 times)

Question 9

full random sampling method

Answer 9

1. divide area into grid, using a tape measure
2. use a random number generator to identify a coordinate
3. place quadrat onto the coordinate
4. count all individuals in quadrat
5. repeat method until you have a large sample size (at least 10 time)

Question 10

formula to calculate the means average per m squared

Answer 10

mean / area

Question 11

what is 0.5 multiplied by 0.5

Answer 11

0.25