Unit 8 - p3 perform a t-test on data collected from laboratory equipment, m3 interpret the results of the t-test

Unit 8 – using statistics in science
P3 - Perform a t-test on data collected from a laboratory experiment
M3 - Interpret the results of the t-test
x 1−x 2
t=
σ1 σ2
√ n1
2

+
n2
2




Cress plant Soil 2 Tissue 2




1 11
√ ( x i− x )
n−1
5.9
√ ( x i− x )
n−1

2 9.5 10.3
3 7 1.694697613 8.4 2.282761486
4 11.2 4.2
5 10.2 6
x 9.78 6.96

9.78−6.96
t=
2 2
1.694697613 2.282761486
√ 5
+
5

9.78−6.96
t=
2.872 5.21100002
√ 5
+
5

9.78−6.96
t=
√ 0.5744+1.0422
2.82
t=
√1.6166
2.82
t=
1.271455858

t=2.217929928

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