Article 6. An introduction to hypothesis testing. Parametric comparison of two groups—1

P Driscoll; F Lecky

doi:10.1136/emj.18.2.124

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An introduction to statistics

Article 6. An introduction to hypothesis testing. Parametric comparison of two groups—1

Online download statistics by month:

Online download statistics by month: February 2001 to March 2024

	Abstract	Full	Pdf
Feb 2001	0	358	157
Mar 2001	0	459	225
Apr 2001	0	223	124
May 2001	0	56	5
Jun 2001	0	40	4
Jul 2001	0	34	9
Aug 2001	0	27	7
Sep 2001	0	22	25
Oct 2001	0	19	9
Nov 2001	0	10	3
Dec 2001	0	14	4
Jan 2002	0	17	2
Feb 2002	0	20	6
Mar 2002	0	18	13
Apr 2002	0	21	2
May 2002	0	10	2
Jun 2002	0	15	3
Jul 2002	0	15	9
Aug 2002	0	23	8
Sep 2002	0	17	2
Oct 2002	0	37	16
Nov 2002	0	38	8
Dec 2002	0	16	5
Jan 2003	0	39	21
Feb 2003	0	19	20
Mar 2003	0	24	18
Apr 2003	0	22	10
May 2003	0	23	10
Jun 2003	0	24	8
Jul 2003	0	66	9
Aug 2003	0	29	16
Sep 2003	0	25	12
Oct 2003	0	59	14
Nov 2003	0	45	18
Dec 2003	0	33	7
Jan 2004	0	42	9
Feb 2004	0	23	6
Mar 2004	0	24	4
Apr 2004	0	28	7
May 2004	0	56	21
Jun 2004	0	74	21
Jul 2004	0	65	29
Aug 2004	0	76	30
Sep 2004	2	100	34
Oct 2004	45	95	38
Nov 2004	17	64	21
Dec 2004	7	70	13
Jan 2005	13	35	30
Feb 2005	13	55	14
Mar 2005	21	113	50
Apr 2005	13	112	39
May 2005	9	127	23
Jun 2005	13	58	40
Jul 2005	8	60	35
Aug 2005	12	72	46
Sep 2005	15	114	47
Oct 2005	16	151	62
Nov 2005	19	130	56
Dec 2005	9	66	29
Jan 2006	14	55	19
Feb 2006	10	67	20
Mar 2006	7	76	39
Apr 2006	2	68	24
May 2006	1	54	32
Jun 2006	6	40	22
Jul 2006	2	47	23
Aug 2006	3	42	31
Sep 2006	3	81	34
Oct 2006	2	150	59
Nov 2006	4	175	62
Dec 2006	1	179	40
Jan 2007	6	166	56
Feb 2007	3	175	44
Mar 2007	5	209	53
Apr 2007	115	62	32
May 2007	93	64	29
Jun 2007	52	29	10
Jul 2007	51	61	20
Aug 2007	31	21	16
Sep 2007	26	27	26
Oct 2007	47	28	26
Nov 2007	54	22	11
Dec 2007	29	10	12
Jan 2008	25	20	16
Feb 2008	40	21	13
Mar 2008	39	18	10
Apr 2008	56	28	18
May 2008	23	14	8
Jun 2008	12	10	7
Jul 2008	14	13	8
Aug 2008	44	23	12
Sep 2008	58	21	11
Oct 2008	42	11	8
Nov 2008	36	17	15
Dec 2008	37	13	3
Jan 2009	32	10	7
Feb 2009	32	20	12
Mar 2009	36	19	13
Apr 2009	51	23	12
May 2009	33	16	5
Jun 2009	35	9	13
Jul 2009	20	8	9
Aug 2009	20	6	6
Sep 2009	23	6	5
Oct 2009	39	20	14
Nov 2009	36	13	6
Dec 2009	35	7	4
Jan 2010	16	8	8
Feb 2010	21	11	4
Mar 2010	24	4	6
Apr 2010	39	9	4
May 2010	16	5	6
Jun 2010	12	7	5
Jul 2010	10	15	8
Aug 2010	41	10	3
Sep 2010	43	24	7
Oct 2010	84	24	5
Nov 2010	89	32	5
Dec 2010	66	32	5
Jan 2011	77	14	3
Feb 2011	125	29	1
Mar 2011	230	43	4
Apr 2011	204	61	4
May 2011	328	46	7
Jun 2011	240	31	12
Jul 2011	237	16	1
Aug 2011	257	33	3
Sep 2011	342	44	11
Oct 2011	363	110	1
Nov 2011	274	178	12
Dec 2011	15	232	7
Jan 2012	19	82	16
Feb 2012	7	128	6
Mar 2012	24	159	11
Apr 2012	13	204	19
May 2012	12	181	14
Jun 2012	13	212	14
Jul 2012	15	145	16
Aug 2012	11	201	14
Sep 2012	14	259	14
Oct 2012	28	497	27
Nov 2012	0	413	12
Dec 2012	0	169	16
Jan 2013	0	138	16
Feb 2013	0	235	18
Mar 2013	0	343	15
Apr 2013	0	372	24
May 2013	0	483	37
Jun 2013	2	376	10
Jul 2013	2	326	14
Aug 2013	3	336	22
Sep 2013	10	344	14
Oct 2013	5	551	31
Nov 2013	6	460	22
Dec 2013	2	507	20
Jan 2014	2	423	39
Feb 2014	4	433	29
Mar 2014	7	509	40
Apr 2014	7	609	36
May 2014	0	700	28
Jun 2014	13	406	14
Jul 2014	5	287	25
Aug 2014	3	333	13
Sep 2014	1	320	14
Oct 2014	4	281	13
Nov 2014	0	414	10
Dec 2014	0	435	26
Jan 2015	5	286	21
Feb 2015	2	286	22
Mar 2015	11	447	19
Apr 2015	2	424	18
May 2015	5	479	22
Jun 2015	1	337	11
Jul 2015	2	283	5
Aug 2015	1	299	19
Sep 2015	8	398	22
Oct 2015	4	250	8
Nov 2015	6	448	19
Dec 2015	11	435	15
Jan 2016	6	336	18
Feb 2016	3	334	20
Mar 2016	4	371	19
Apr 2016	3	417	35
May 2016	11	437	23
Jun 2016	8	355	19
Jul 2016	5	353	13
Aug 2016	5	352	15
Sep 2016	5	218	16
Oct 2016	6	277	20
Nov 2016	8	254	17
Dec 2016	10	279	20
Jan 2017	9	242	15
Feb 2017	2	183	2
Mar 2017	7	178	18
Apr 2017	3	255	23
May 2017	7	230	22
Jun 2017	47	126	6
Jul 2017	49	49	5
Aug 2017	69	69	5
Sep 2017	95	83	7
Oct 2017	165	157	12
Nov 2017	173	163	7
Dec 2017	165	159	6
Jan 2018	128	122	3
Feb 2018	127	116	10
Mar 2018	288	270	9
Apr 2018	198	198	17
May 2018	161	153	10
Jun 2018	117	117	5
Jul 2018	122	122	15
Aug 2018	111	111	13
Sep 2018	172	172	20
Oct 2018	253	253	21
Nov 2018	226	226	19
Dec 2018	180	180	16
Jan 2019	147	146	11
Feb 2019	113	113	19
Mar 2019	177	175	20
Apr 2019	178	178	27
May 2019	161	161	36
Jun 2019	133	133	21
Jul 2019	146	147	27
Aug 2019	112	112	17
Sep 2019	104	104	17
Oct 2019	192	192	30
Nov 2019	186	186	29
Dec 2019	207	207	22
Jan 2020	114	114	27
Feb 2020	131	130	23
Mar 2020	178	177	23
Apr 2020	163	163	28
May 2020	112	112	24
Jun 2020	116	116	20
Jul 2020	75	74	21
Aug 2020	80	80	21
Sep 2020	137	134	21
Oct 2020	167	164	29
Nov 2020	132	127	17
Dec 2020	242	240	18
Jan 2021	204	205	24
Feb 2021	176	176	95
Mar 2021	81	84	59
Apr 2021	83	83	8
May 2021	126	128	29
Jun 2021	136	137	15
Jul 2021	196	205	15
Aug 2021	277	286	43
Sep 2021	351	363	29
Oct 2021	249	256	64
Nov 2021	199	206	31
Dec 2021	112	117	17
Jan 2022	163	169	19
Feb 2022	115	119	15
Mar 2022	177	182	29
Apr 2022	195	196	17
May 2022	144	147	30
Jun 2022	116	119	42
Jul 2022	85	83	13
Aug 2022	77	79	28
Sep 2022	85	91	40
Oct 2022	94	92	19
Nov 2022	145	146	60
Dec 2022	94	96	8
Jan 2023	189	192	11
Feb 2023	91	95	16
Mar 2023	78	82	17
Apr 2023	65	67	25
May 2023	119	120	59
Jun 2023	121	122	29
Jul 2023	69	69	26
Aug 2023	85	86	17
Sep 2023	70	71	19
Oct 2023	96	98	44
Nov 2023	157	162	46
Dec 2023	333	26	16
Jan 2024	53	3	0
Feb 2024	109	3	1
Mar 2024	233	3	10
Total	17059	40028	5686

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