# Analyzing Your Data. Was my difference caused by random factors?

## Presentation on theme: "Analyzing Your Data. Was my difference caused by random factors?"— Presentation transcript:

Was my difference caused by random factors?

Bob’s Data C1T1 00 02 12 13 13 13 24 34 54 65

Alice’s Data C2T2 12 12 12 23 23 23 23 34 34 34

Bob’s Data C1T1 00 02 12 13 13 13 24 34 54 65 C2T2 12 12 12 23 23 23 23 34 34 34 Alice’s Data

Bob’s DataAlice’s Data

Bob’s DataAlice’s Data C1 Standard Deviation: 2.05 T1 Standard Deviation: 1.41 C2 Standard Deviation: 0.82 T2 Standard Deviation: 0.82 Average Standard Deviation: 1.73 Average Standard Deviation: 0.82

Bob’s DataAlice’s Data Average Standard Deviation: 1.73 Average Standard Deviation: 0.82 1 / 1.73 =.58 Effect Size =.58 1 / 0.82 = 1.22 Effect Size = 1.22 Effect Size > 1 = GOOD!

t-Tests

C1T1 00 02 12 13 13 13 24 34 54 65 C2T2 12 12 12 23 23 23 23 34 34 34 Bob’s DataAlice’s Data http://vassarstats.net/tu.html For Alice’s Data For Bob’s Data

p = probability that your difference was due to random factors!

Bob’s DataAlice’s Data http://vassarstats.net/tu.html p =.22.22 >.05 (22% probability that Bob’s results are due to chance) p =.01.01 <.05 (1% probability that Alice’s results are due to chance)

Thank You & Happy Analyses!