Description Usage Arguments Details Author(s) Examples
Function to test hypothesis of equality of two means given the mean, standard deviation and size (N) of each population.
1 | gx.t.test(xbar1, s1, n1, xbar2, s2, n2)
|
xbar1 |
mean of population 1. |
s1 |
standard deviation of population 1. |
n1 |
size of population 1. |
xbar2 |
mean of population 2. |
s2 |
stabdard deviation of population 2. |
n2 |
size of population 2. |
Function written to support QA/QC studies where data for sets of Control Reference Material analyses are to be compared, e.g., between two projects, or when comparing published statistics with those from a project.
The hypothesis, H0: mean1 = mean2, is tested at the 95% confidence level and the user informed whether the hypothesis is accepted or rejected. Additionally the difference, t-value, degrees of freedom, and p-value are displayed.
Robert G. Garrett
1 2 |
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