Isopod Case Study

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In this experiment, we are testing whether or not the Isopods' have more of a preference for an environment with syrup or with water. The alternative hypothesis we devised is that if the Isopods are placed in between a syrup and a water chamber, then they will go towards the syrup chamber. This is believed because we believe the Isopods may have an attraction to the sweet scent and taste of the syrup. My group and I observed 10 pillbugs behavior over the span of 5 minutes, recording the number of pill bugs found in each chamber every 30 seconds. We fail to reject the null hypothesis because the chi squared value is 3.6 which is less than 3.84 (critical value at .05). This indicates that we are unable to show a statistical difference between…show more content…
Water Environment
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The alternative hypothesis we developed is that when ten Isopods are placed between a syrup chamber and a water chamber, then the Isopods will gravitate towards the syrup chamber. The data fails to support our alternative hypothesis and fails to reject the null hypothesis because the chi squared is 3.6 and the critical value is 3.84. This is an indication of kinesis because the movement of the Isopods was determined by the data to be undirected. A source of error may be that at a few of the 30 second intervals several of the bugs were found in the middle between the two chambers and it was not possible to distinguish a correct environment for them. In future experimentation we would create a third column for data to mark the Isopods that are found in the middle at the 30 second intervals. Also, we could have more people looking to more thoroughly account for each Isopod. Another error that makes our results less valid is that the experiment was only completed once, meaning it is possible that with more evidence the null hypothesis could be

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