1. How do scientists estimate the size of a large population? By taking a random sample.
2. How many dandelions are there on the grid? 115 dandelions
3. What does it mean that we scaled it up? By scaling it up we are able to have an estimate the total amount of dandelions in the yard.
4. Why is it important to randomly select segments to count? It is important to randomly select segments to count due to "experimenter bias", which makes you choose the most conveniently located segment.
5. What is the simplest way to determine the appropriate sample size? The simplest way to determine the appropriate sample is to graph a running average of the samples.
6. What is the difference between measuring abundance versus Presence/absence? When you measure abundance absence it is the actual number of individual in a given area. While when measuring presence absence is relatively easy to collect data.
7. How do we estimate sample size? Instead of using a grid square, we randomly pick individuals points to samples.
8. How do we estimate impervious surface? Explain. Impervious surface is when paved surfaces prevent rainwater from naturally soaking into the ground. We measure impervious surface by measuring the percentage of a catchment area.
9. What are the steps for conducting a simple transect?
1-Randomly selecting a starting point
2-Randomly choose a direction
3-Lay out a transect
4-Determine where along the transect you will collect your simple data
5-Lay out a sampling frame
10.Explain what you learned by doing this activity. There are two things that I learned in this activity. First, is the new way to measure our population and methods for using a grid to sample species.
2. How many dandelions are there on the grid? 115 dandelions
3. What does it mean that we scaled it up? By scaling it up we are able to have an estimate the total amount of dandelions in the yard.
4. Why is it important to randomly select segments to count? It is important to randomly select segments to count due to "experimenter bias", which makes you choose the most conveniently located segment.
5. What is the simplest way to determine the appropriate sample size? The simplest way to determine the appropriate sample is to graph a running average of the samples.
6. What is the difference between measuring abundance versus Presence/absence? When you measure abundance absence it is the actual number of individual in a given area. While when measuring presence absence is relatively easy to collect data.
7. How do we estimate sample size? Instead of using a grid square, we randomly pick individuals points to samples.
8. How do we estimate impervious surface? Explain. Impervious surface is when paved surfaces prevent rainwater from naturally soaking into the ground. We measure impervious surface by measuring the percentage of a catchment area.
9. What are the steps for conducting a simple transect?
1-Randomly selecting a starting point
2-Randomly choose a direction
3-Lay out a transect
4-Determine where along the transect you will collect your simple data
5-Lay out a sampling frame
10.Explain what you learned by doing this activity. There are two things that I learned in this activity. First, is the new way to measure our population and methods for using a grid to sample species.