One Quantitative Variable, Multiple Groups
Variable name:
Input:
Raw data
Raw data by variable
Mean and standard deviation
Fivenumber summary
Group
Name
Input data separated by commas or spaces.
Mean
SD
n
Min
Q1
Median
Q3
Max
Input data separated by commas or spaces.
Keep observations in the same order.
Values
Categories
Graph Distributions
Graph type:
Dotplot
Histogram
Boxplot
Stemplot
Normal probability plot
Label histogram with:
Frequency
Relative frequency
Enter interval width:
Enter boundary value:
Split stems:
No
Yes, into two groups
Yes, into five groups
Shift stem
additional decimal places to the left, truncating as needed.
Collapse groups of empty stems?
No
Yes
Collapse groups of
or more empty stems.
Summary Statistics
Perform Inference
Inference procedure:
Simulate difference in two means
Simulate difference in two medians
Simulate difference in two SDs
2sample t interval (μ₁  μ₂)
2sample t test (μ₁  μ₂)
F test for σ₁²/σ₂²
Oneway ANOVA
Wilcoxon rank sum test (Normal approx)
KruskalWallis test
Conservative degrees of freedom:
No
Yes
Confidence level:
%
Alternative hypothesis:
μ₁  μ₂ > 0
μ₁  μ₂ < 0
μ₁  μ₂ ≠ 0
Alternative hypothesis:
σ₁² > σ₂²
σ₁² < σ₂²
σ₁² ≠ σ₂²
Include followup analysis using a
confidence level of
%
Alternative hypothesis is that population median 1 is
>
<
≠
population median 2
Number of samples to add:
The applet will graph all of your results until you hit "Reset simulation."
Count the number and percent of dots
less than
greater than
or equal to
# of samples:
Most recent result:
Mean:
SD:
Adjust color, rounding, and percent/proportion preferences

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