B7: Quiz 6
1) Outline how we can use quadrats to estimate the number of daisies in a field.
2) A student wants to estimate the number of daises in a field. He throws a 1 m2 quadrat down 10 times and the number of daises for each of the 10 quadrats are shown below.
a) Work out the mean number of daises per quadrat.
b) The field is 3,900 m2. Work out an estimate for the number of daises in the whole field.
c) Why would a student work out an estimate for the number of daises rather than the actual number of daises in a field?
3) A student wants to estimate the number of dandelions in a field that is 2,480 m2. He uses a 0.5 m2 quadrat and throws it down 8 times. The number of dandelions for each of the 8 quadrats is shown below.
a) Calculate the mean number of dandelions per quadrat.
b) Find an estimate for the number of dandelions in the field.
Be careful with this question as the quadrat is 0.5 m2 and not 1 m2.
4) A student wants to investigate the distribution of dandelions in the middle of a field and in a forest. She uses quadrats to investigate the distribution and places 10 quadrats down randomly in the two locations. Her values for the 10 quadrats in the middle of a field and in a forest are shown in the table below.
a) Calculate the mean number of dandelions per quadrat in the middle of the field and in the forest.
b) Where is the distribution of dandelions the greatest? Give a potential explanation as to why the population of dandelions is the greatest there.