Skip to main content

Table 2 Proportion of correct responses by cohort

From: Evaluation of an interactive, case-based review session in teaching medical microbiology

     

Tests of Differences based on Session

Tests of Cohort Differences

 

2004

2005

2006

2007

Results of two sample z tests of proportions

     

Comparison

z

Direction

Comparison

z

1

0.51

--

--

0.69

2004 vs 2007

-2.52*

predicted

--

--

2

--

0.47

--

0.78

2005 vs 2007

-4.53**

predicted

--

--

3

0.50

--

--

0.56

2004 vs 2007

-0.79

predicted

--

--

4

0.70

--

0.85

--

2004 vs 2006

-2.36*

predicted

--

--

5

0.54

--

0.63

0.59

2004 vs 2006

2004 vs 2007

-1.25

-0.66

predicted

predicted

2006 vs 2007

0.59, ns

6

0.64

0.88

--

0.71

2004 vs 2007 2005 vs 2007

-1.02

+2.87**

predicted

opposite

2004 vs 2005

-3.85**

7

0.97

0.99

--

0.97

2004 vs 2007

2005 vs 2007

0.00

+1.02

equivalent

opposite

2004 vs 2005

1.01, ns

  1. z = +/-1.96 used as criterion for differences at 95% confidence (denoted by *)
  2. z = +/-2.56 used as criterion for differences at 99% confidence (denoted by **)
  3. Note: 2004 n = 98, 2005 n = 98, 2006 n = 98, 2007 n = 97