# Analysis of the Medicamento data, using Parasitos as the response variable and Grupo as the single grouping factor.

## Group summaries

``````The following objects are masked _by_ .GlobalEnv:

grupo, parasitos
``````
Level Mean Standard deviation n Standard error
Control 53.6 16.28360 10 5.149326
50mg 46.6 16.14655 10 5.105988
125mg 37.8 10.19586 10 3.224214

The ratio of the largest group standard deviation to the smallest is 1.6

## Comparative boxplots

`````` This graph has 3 boxplots printed vertically
with the title:
"" appears on the x-axis.
"" appears on the y-axis.
Tick marks for the y-axis are at: 20, 30, 40, 50, 60, 70, and 80
Group Control has 10 values.
There are no outliers marked for this group
The whiskers extend to 29 and 85 from the ends of the box,
which are at 40 and 62
The median, 55 is 68 % from the lower end of the box to the upper end.
The upper whisker is 2.09 times the length of the lower whisker.
Group 50mg has 10 values.
There are no outliers marked for this group
The whiskers extend to 20 and 64 from the ends of the box,
which are at 29 and 60
The median, 52 is 74 % from the lower end of the box to the upper end.
The upper whisker is 0.44 times the length of the lower whisker.
Group 125mg has 10 values.
There are no outliers marked for this group
The whiskers extend to 21 and 52 from the ends of the box,
which are at 31 and 46
The median, 35 is 27 % from the lower end of the box to the upper end.
The upper whisker is 0.6 times the length of the lower whisker.
``````

## Comparative dotplots

``````Warning in dotplot.formula(parasitos ~ grupo, xlab = "Parasitos", ylab =
"Grupo"): The dotplot command is a wrapper for stripchart, and is not a base R
function.
``````

``````This graph has 30 dotplots printed horizontally
with the title:
"" appears on the x-axis.
"" appears on the y-axis.
Tick marks for the x-axis are at: 20, 30, 40, 50, 60, 70, and 80
the data that range from 20 to 85 has been broken into 6 bins.
The counts are:
Control: 1 0 0 0 0 0
50mg: 1 0 0 0 0 0
125mg: 1 0 0 0 0 0
NA: 0 1 0 0 0 0
NA: 1 0 0 0 0 0
NA: 1 0 0 0 0 0
NA: 0 1 0 0 0 0
NA: 1 0 0 0 0 0
NA: 0 1 0 0 0 0
NA: 0 0 1 0 0 0
NA: 0 1 0 0 0 0
NA: 0 1 0 0 0 0
NA: 0 0 1 0 0 0
NA: 0 0 1 0 0 0
NA: 0 1 0 0 0 0
NA: 0 0 0 1 0 0
NA: 0 0 0 1 0 0
NA: 0 1 0 0 0 0
NA: 0 0 0 1 0 0
NA: 0 0 0 1 0 0
NA: 0 0 1 0 0 0
NA: 0 0 0 1 0 0
NA: 0 0 0 1 0 0
NA: 0 0 1 0 0 0
NA: 0 0 0 0 1 0
NA: 0 0 0 1 0 0
NA: 0 0 1 0 0 0
NA: 0 0 0 0 0 1
NA: 0 0 0 0 1 0
NA: 0 0 1 0 0 0
``````

## One-way Analysis of Variance

``````
The p value for grupo is 0.0674

The ratios of the group standard deviations to the overall standard deviation
(groups ordered by increasing mean) are:
1.12 1.11 0.7

``````
``````            Df Sum Sq Mean Sq F value Pr(>F)
grupo        2   1254   626.8   2.986 0.0674 .
Residuals   27   5668   209.9
---
Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
``````

## Tests for homogeneity of Variance

``````
Bartlett test of homogeneity of variances

data:  parasitos by grupo
Bartlett's K-squared = 2.168, df = 2, p-value = 0.3382
``````
``````
Fligner-Killeen test of homogeneity of variances

data:  parasitos by grupo
Fligner-Killeen:med chi-squared = 2.2805, df = 2, p-value = 0.3197
``````