[R] t tests/ANOVA

[Adaikalavan Ramasamy]

First check that your data satisfies the normality assumption. If yes, 
then start with the ANOVA test

    summary( fit <- aov( genomes ~ clonefed ) )

and *if* you find a significant F-value, you can see which difference is 
significant. i.e. post-hoc analysis.

    TukeyHSD( fit, "clonefed" )

You can use help("aov") etc to find out more details including examples.

Regards, Adai



Georgina Sarah Humphreys wrote:
> I have a set of data that comprises genome numbers in single eggs from three different parasite clones - 3D7, HB3, and MIX.  I can draw a boxplot of the genome numbers for each clonefed but how do I carry out a t test or ANOVA to compare if the means are signifcantly different? (Data is listed below)
> 
> Many thanks,
> Georgina Humphreys
> 
> clonefed	genomes
> HB3	21.3
> HB3	23.5
> HB3	25.9
> 3D7	27.2
> HB3	28.1
> MIX	35.1
> MIX	37.9
> MIX	42.1
> MIX	42.4
> HB3	46.3
> HB3	46.3
> MIX	48.4
> MIX	52.1
> HB3	54.6
> MIX	55.4
> 3D7	57.6
> HB3	58.4
> 3D7	62.1
> MIX	63.6
> MIX	66.5
> 3D7	69.1
> 3D7	76.2
> MIX	77.5
> MIX	80.4
> MIX	85.5
> MIX	85.9
> HB3	96
> HB3	106.3
> 3D7	108.1
> MIX	113.8
> MIX	117.4
> MIX	118
> 3D7	122.8
> 3D7	131.4
> MIX	138.7
> MIX	142.6
> MIX	143
> 3D7	144
> MIX	151.6
> MIX	155.2
> MIX	162.4
> MIX	168.4
> MIX	169.3
> 3D7	172.3
> HB3	173
> HB3	191.9
> MIX	192.7
> HB3	200
> MIX	206.3
> 3D7	210.2
> HB3	223.7
> HB3	223.9
> 3D7	232.1
> HB3	238.6
> MIX	240.8
> 3D7	254.3
> 3D7	257.6
> 3D7	261.8
> 3D7	269.9
> HB3	277
> MIX	289.1
> MIX	293.2
> MIX	295.2
> MIX	295.7
> MIX	310.4
> 3D7	311.9
> 3D7	311.9
> MIX	313.1
> MIX	317.8
> MIX	332.2
> 3D7	334.9
> 3D7	338.2
> MIX	340
> MIX	360.5
> 3D7	372.8
> 3D7	376.6
> HB3	390.3
> MIX	419.1
> 3D7	420
> MIX	427.4
> MIX	443
> MIX	449.7
> MIX	452.8
> MIX	501.4
> 3D7	502.9
> 3D7	505.5
> 3D7	506.3
> 3D7	529
> MIX	534.4
> MIX	540.6
> MIX	542
> 3D7	545.2
> MIX	547.2
> MIX	554.2
> MIX	556.5
> 3D7	564.9
> 3D7	575.1
> 3D7	580.6
> MIX	591.5
> 3D7	655.5
> 3D7	666.1
> 3D7	667.2
> 3D7	699
> 3D7	741.2
> 3D7	744.8
> 3D7	752.2
> MIX	795.9
> 3D7	810.9
> HB3	816.4
> MIX	849.2
> 3D7	852.9
> 3D7	875.4
> 3D7	891.3
> MIX	906.5
> MIX	922.3
> MIX	949.6
> MIX	986.1
> MIX	994.3
> MIX	1005.3
> MIX	1061.3
> MIX	1159.5
> 3D7	1163.2
> MIX	1177.5
> 3D7	1211.3
> 3D7	1249.7
> 3D7	1318.3
> MIX	1579.3
> MIX	1585.2
> MIX	1590.3
> MIX	1788.7
> MIX	2012.9
> 3D7	2067.4
> 
> PhD Student
> Division of Infection and Immunity
> B5-29, GBRC
> 120 University Place
> Glasgow
> G12 8TA
> Tel: 0141 330 5650
> 
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