diff --git a/education/statistics/Sampling.md b/education/statistics/Sampling.md
index 438926c..6360798 100644
--- a/education/statistics/Sampling.md
+++ b/education/statistics/Sampling.md
@@ -15,18 +15,19 @@ In the above example:
 - The *parameter* was *6%*
 - The *sample* was *1004 taxpayers*
 - The *statistic* was *13%*
-
+## Sampling
+| Sample Type | Description |
+| ---- | ---- |
+| Simple random | Advantages:<br>- Procedure is impartial<br>- Law of Averages<br>Disadvantages<br>- Not always possible<br>- Can be very expensive |
+| Quota Sampling | Attempts to get certain proportions based on key characteristics. Quota sampling doesn't guarantee that the selection is an accurate representation. |
+| Cluster Sampling | Divide population into subgroups, randomly select a subgroup, and sample all of the subjects in that group |
 ## Simple Random Samples
-Advantages:
-- Procedure is impartial
-- Law of Averages
-Disadvantages
-- Not always possible
-- Can be very expensive
 
 ## Bias
 | Bias Type | Description |
 | ---- | ---- |
 | Selection | When the procedure that selects the sample is biased |
 | Non-Response | Those that don't respond to a survey may have different characteristics than those that do respond |
-|  |  |
+| Response | When the question is worded in a leading way to elicit a certain response. |
+| Volunteer response | Self selecting, individuals volunteer to answer |
+| Measurement | Interviewing method influences the response, uses loaded words or ambiguities. |