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Opened 5 years ago
Closed 5 years ago
#7402 closed Bugs (fixed)
Typo in math example
Reported by: | n.g.davies@… | Owned by: | pbristow |
---|---|---|---|
Milestone: | To Be Determined | Component: | math |
Version: | Boost 1.52.0 | Severity: | Problem |
Keywords: | math students t two sample | Cc: |
Description
In the function two_samples_t_test_equal_sd in libs/math/example/students_t_two_samples.cpp:
// // Now we can calculate and output some stats: // // Degrees of freedom: double v = Sn1 + Sn2 - 2; cout << setw(55) << left << "Degrees of Freedom" << "= " << v << "\n"; // Pooled variance: double sp = sqrt(((Sn1-1) * Sd1 * Sd1 + (Sn2-1) * Sd2 * Sd2) / v); /********* THIS LINE BELOW **********/ cout << setw(55) << left << "Pooled Standard Deviation" << "= " << v << "\n"; // t-statistic: double t_stat = (Sm1 - Sm2) / (sp * sqrt(1.0 / Sn1 + 1.0 / Sn2)); cout << setw(55) << left << "T Statistic" << "= " << t_stat << "\n";
I believe the line marked should have sp in place of v.
Attachments (0)
Change History (2)
comment:1 Changed 5 years ago by johnmaddock
- Owner changed from johnmaddock to pbristow
comment:2 Changed 5 years ago by pbristow
- Keywords math students t two sample added
- Resolution set to fixed
- Status changed from new to closed
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Thanks for reporting this. Glad to see someone is reading this.
Corrected in trunk SVN 80706