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- Comparing the Standard Normal and Student's t distributions
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- This is a self extracting archive with 6 CGA graphics screens:
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- not1 std normal pdf and Student's t pdf with 2 df
- not2 std normal pdf and Student's t pdf with 8 df
- not3 std normal pdf and Student's t pdf with 32 df
- not4 std normal and 32 df t reliability functions (1 - cdf) -5 < x < 5
- not5 std normal and 32 df t reliability functions (1 - cdf) 1.5 < x < 3
- not6 % diff between the functions shown in not5, 100 * (t - n) / t
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- Despite the apparently good agreement between the distributions in not3 and
- not4, there is large percentage difference in the upper tail, seen in not5
- and not6. P values from the normal are not good estimates of p values from
- the t with 32 df. Use t tables that stop at 30 df with caution.
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- files: not1.com - not6.com the CGA screens as self displaying com files
- *.spc specification files used by kspdat
- *.d##, *.c## data and codebook files generated by kspdat
- not.doc discussion of how to do this
- not.gnu gnuplot 2.0 commands used to generate plots
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- The files occupy about 200k on disk. Do you want to extract the files now?