Student's T Test by hand ✍️(including Standard Deviation) Geography A Level Fieldwork, Pebble Size.

Geography A Level Statistics. Statistical Tests for examinations and NEA (Non Examined Assessment) What is a Student's T Test? A Student's T Test is used to establish whether there is a significant difference between 2 data sets. In this case, pebble size in the 2 different sections of the beach (managed vs. unmanaged) What is Standard Deviation? (which is used as a part of the T Test calculation) This is a way to objectively work out how spread out (dispersed) the data is from the mean. In this case, a standard deviation score of 11.185 for the managed beach, and 9.35 for the unmanaged beach establishes that 68% of the data lies within this number of mm from the mean.