To test or not to test: preliminary assessment of normality when comparing two independent samples
Student’s two-sample t test is generally used for comparing the means of two independent samples, for example, two treatment arms. Under the null hypothesis, the t test assumes that the two samples arise from the same normally distributed population with unknown variance. Adequate control of the Typ...
Gespeichert in:
| Hauptverfasser: | , , |
|---|---|
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
19 June 2012
|
| In: |
BMC medical research methodology
Year: 2012, Jahrgang: 12 |
| ISSN: | 1471-2288 |
| DOI: | 10.1186/1471-2288-12-81 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1186/1471-2288-12-81 Verlag, kostenfrei, Volltext: https://doi.org/10.1186/1471-2288-12-81 
|
| Verfasserangaben: | Justine Rochon, Matthias Gondan and Meinhard Kieser |
MARC
| LEADER | 00000caa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1577645049 | ||
| 003 | DE-627 | ||
| 005 | 20230426230653.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 180716s2012 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1186/1471-2288-12-81 |2 doi | |
| 035 | |a (DE-627)1577645049 | ||
| 035 | |a (DE-576)507645049 | ||
| 035 | |a (DE-599)BSZ507645049 | ||
| 035 | |a (OCoLC)1341013929 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 33 |2 sdnb | ||
| 100 | 1 | |a Rochon, Justine |d 1975- |e VerfasserIn |0 (DE-588)1056825669 |0 (DE-627)794126847 |0 (DE-576)403098734 |4 aut | |
| 245 | 1 | 0 | |a To test or not to test |b preliminary assessment of normality when comparing two independent samples |c Justine Rochon, Matthias Gondan and Meinhard Kieser |
| 264 | 1 | |c 19 June 2012 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a Computermedien |b c |2 rdamedia | ||
| 338 | |a Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Gesehen am 16.07.2018 | ||
| 520 | |a Student’s two-sample t test is generally used for comparing the means of two independent samples, for example, two treatment arms. Under the null hypothesis, the t test assumes that the two samples arise from the same normally distributed population with unknown variance. Adequate control of the Type I error requires that the normality assumption holds, which is often examined by means of a preliminary Shapiro-Wilk test. The following two-stage procedure is widely accepted: If the preliminary test for normality is not significant, the t test is used; if the preliminary test rejects the null hypothesis of normality, a nonparametric test is applied in the main analysis. | ||
| 650 | 4 | |a Mann-Whitney’s U test | |
| 650 | 4 | |a Student’s t test | |
| 650 | 4 | |a Testing for normality | |
| 700 | 1 | |a Gondan, Matthias |e VerfasserIn |0 (DE-588)103832159X |0 (DE-627)757123074 |0 (DE-576)181338165 |4 aut | |
| 700 | 1 | |a Kieser, Meinhard |d 1960- |e VerfasserIn |0 (DE-588)103276547X |0 (DE-627)739277766 |0 (DE-576)168963825 |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t BMC medical research methodology |d London : BioMed Central, 2001 |g 12(2012) Artikel-Nummer 81, 11 Seiten |h Online-Ressource |w (DE-627)326643818 |w (DE-600)2041362-2 |w (DE-576)10701467X |x 1471-2288 |7 nnas |a To test or not to test preliminary assessment of normality when comparing two independent samples |
| 773 | 1 | 8 | |g volume:12 |g year:2012 |a To test or not to test preliminary assessment of normality when comparing two independent samples |
| 856 | 4 | 0 | |u http://dx.doi.org/10.1186/1471-2288-12-81 |x Verlag |x Resolving-System |z kostenfrei |3 Volltext |
| 856 | 4 | 0 | |u https://doi.org/10.1186/1471-2288-12-81 |x Verlag |z kostenfrei |3 Volltext |
| 951 | |a AR | ||
| 992 | |a 20180716 | ||
| 993 | |a Article | ||
| 994 | |a 2012 | ||
| 998 | |g 103276547X |a Kieser, Meinhard |m 103276547X:Kieser, Meinhard |d 910000 |d 999701 |e 910000PK103276547X |e 999701PK103276547X |k 0/910000/ |k 1/910000/999701/ |p 3 |y j | ||
| 998 | |g 103832159X |a Gondan, Matthias |m 103832159X:Gondan, Matthias |d 910000 |d 999701 |e 910000PG103832159X |e 999701PG103832159X |k 0/910000/ |k 1/910000/999701/ |p 2 | ||
| 998 | |g 1056825669 |a Rochon, Justine |m 1056825669:Rochon, Justine |d 50000 |e 50000PR1056825669 |k 0/50000/ |p 1 |x j | ||
| 999 | |a KXP-PPN1577645049 |e 3017625826 | ||
| BIB | |a Y | ||
| SER | |a journal | ||
| JSO | |a {"recId":"1577645049","name":{"displayForm":["Justine Rochon, Matthias Gondan and Meinhard Kieser"]},"relHost":[{"id":{"zdb":["2041362-2"],"issn":["1471-2288"],"eki":["326643818"]},"pubHistory":["1.2001 -"],"recId":"326643818","physDesc":[{"extent":"Online-Ressource"}],"language":["eng"],"note":["Gesehen am 15.01.16"],"origin":[{"dateIssuedDisp":"2001-","publisherPlace":"London ; Berlin ; Heidelberg","publisher":"BioMed Central ; Springer","dateIssuedKey":"2001"}],"type":{"bibl":"periodical","media":"Online-Ressource"},"title":[{"title_sort":"BMC medical research methodology","title":"BMC medical research methodology"}],"part":{"volume":"12","year":"2012","text":"12(2012) Artikel-Nummer 81, 11 Seiten"},"disp":"To test or not to test preliminary assessment of normality when comparing two independent samplesBMC medical research methodology"}],"id":{"eki":["1577645049"],"doi":["10.1186/1471-2288-12-81"]},"person":[{"display":"Rochon, Justine","family":"Rochon","given":"Justine","role":"aut"},{"given":"Matthias","role":"aut","family":"Gondan","display":"Gondan, Matthias"},{"family":"Kieser","display":"Kieser, Meinhard","role":"aut","given":"Meinhard"}],"language":["eng"],"note":["Gesehen am 16.07.2018"],"type":{"bibl":"article-journal","media":"Online-Ressource"},"origin":[{"dateIssuedDisp":"19 June 2012","dateIssuedKey":"2012"}],"title":[{"title":"To test or not to test","title_sort":"To test or not to test","subtitle":"preliminary assessment of normality when comparing two independent samples"}]} | ||
| SRT | |a ROCHONJUSTTOTESTORNO1920 | ||