Rating  Views  Title  Posted Date  Contributor  Common Core Standards  Grade Levels  Resource Type  

Sampling Techniques  Jelly BlubbersThis activity introduces the Simple Random Sample (SRS) to students, and shows why this process helps to get an unbiased sample statistic. Relying on our perceptions can often be deceiving. In this exercisestudents are asked to determine the average length of a jellyblubber (a hypothetically recently discovered marine species) using a variety of techniques. The student will learn that a Simple Random Sample (SRS) is the most accurate method of determining this parameter, and that intuition can be deceptive. 
11/29/2014 
Trey Cox

6.SP.A.1 6.SP.B.4 6.SP.A.2 7.SP.A.1 MP.1 MP.3 MP.4 MP.5  6 7  Activity  
The Forest ProblemStudents want to know why they would ever use a sampling method other than a simple random sample. This lesson visually illustrates the effect of using a simple random sample (SRS) vs. a stratified random sample. Students will create a SRS from a population of apple trees and use the mean of the SRS to estimate the mean yield of the trees. Students will then create a stratified random sample from the same population to again estimate the yield of the trees. The use of the stratified random sample is to control for a known source of variation in the yield of the crop, a nearby forest. 
9/4/2014 
Trey Cox

6.SP.A.1 6.SP.B.4 6.SP.B.5 7.SP.A.1 7.SP.A.2 MP.1 MP.2 MP.3 MP.4 MP.5 MP.6 MP.7  6 7  Activity 