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Nick Dotson-BES 301-Results

Results

No Significance in Shell Growth Mean Differences

v  In looking at this information on Nucella lamellosa’s shell weight growth within a control group and knocked off barnacle 1 time daily group, the following results convey the findings from a data analysis comparing these groups’ end date shell growth means.  As represented in figure 1.1 a numerical difference between these two groups’ means and standard errors did exist.  With a control group end date shell growth mean=0.264 and a standard error of plus or minus=0.029066972.  And a knocked off 1 time daily end date shell growth mean=0.203 with a standard error of plus or minus=0.036485918.  A t-test assuming unequal variances ran with a significance level of 0.05 however, showed no statistical significance to this difference in means at the (p=0.208403) level.  Due to my significance level conveying I was willing to make a mistake 5% of the time and the p value coming in at (p=0.208403), this meant there was a greater than twenty percent chance that the differences in means shown was due to random chance alone.  Based on these results I was then able to reject my null hypothesis of “a significant difference will exist between the end date shell weight growth of the control group and the end date shell weight growth of the knocked off barnacle 1 time daily group.  In turn, based on these same findings I accepted my research hypotheses that” a significant difference will not exist between the end date shell weight growth of the control group and the end date shell weight growth of the knocked off barnacle 1 time daily group.  Data-(Price et al 2002-2010)

Figure 1.1: Error bars represent standard error across population in each distinct group shown. p=0.208403