Investigating the impact age has on within-over and death bowling performances in international level 50-over cricket

Figures & data

Table 1. Compositions of bowler types in the 50 over cricket world cup 2019.

	50 Over All Bowlers Age Groups			50 Over Death Bowlers Age Groups
Type of Bowler	18–24 (%)	25–31 (%)	32+ (%)	18–24 (%)	25–31 (%)	32+ (%)
Fast	48	56	31	60	81	69
Medium	14	13	0	20	19	31
Off-Spin	14	10	46	10	0	0
Leg-Spin	14	11	15	10	0	0
Orthodox	5	8	8	0	0	0
Unorthodox	5	2	0	0	0	0

Table 2. Summary of bowling performances in the 50 over world cup 2019.

Variable	GROUP 1 (18–24)	GROUP 2 (25–31)	GROUP 3 (32+)
Runs Conceded Ball 1	46 ± 26	35 ± 26	38 ± 31
Runs Conceded Ball 2	46 ± 27	36 ± 25	32 ± 25
Runs Conceded Ball 3	47 ± 25	35 ± 26	31 ± 25
Runs Conceded Ball 4	45 ± 24	37 ± 26	34 ± 29
Runs Conceded Ball 5	44 ± 23	34 ± 22	34 ± 26
Runs Conceded Ball 6	49 ± 28	35 ± 24	26 ± 20
Wickets Taken (tournament)	8 ± 6	6 ± 6	5 ± 5
Death Bowling
Runs Conceded (DB overs only)	26 ± 24	23 ± 16	19 ± 14
Wickets Taken (DB overs only)	1 ± 1	3 ± 2	1 ± 1

Table 3. Parameter estimates all bowlers – primary OLR.

Variable (Group 1)	B	B (EXP)	P-Value	Lower Bound (EXP B)	Upper Bound (EXP B)
Runs Conceded Ball 1	0.036	1.036	0.120	0.989	1.086
Runs Conceded Ball 2	0.001	1.001	0.971	0.961	1.042
Runs Conceded Ball 3	−0.017	0.983	0.462	0.941	1.028
Runs Conceded Ball 4	0.044	1.045	0.095	0.991	1.101
Runs Conceded Ball 5	0.006	1.006	0.794	0.960	1.055
Runs Conceded Ball 6	−0.080	0.923	0.001**	0.880	0.969
Wickets Taken (tournament)	−0.051	0.951	0.412	0.842	1.073

* = Significant at 95% CI, ** = Significant at 99% CI

Table 4. Parameter estimates death bowlers only – secondary MLR.

Variable (Group 1)	B	B (EXP)	P-Value	Lower Bound (EXP B)	Upper Bound (EXP B)
Runs Conceded	0.020	1.021	0.460+	0.967	1.077
Wickets Taken	0.186	1.204	0.732+	0.417	3.479
Variable (Group 2)	B	B (EXP)	P-Value	Lower Bound (EXP B)	Upper Bound (EXP B)
Runs Conceded	−0.013	0.987	0.745+	0.915	1.066
Wickets Taken	1.255	3.506	0.022*	1.200	10.248
* = Significant at 95% CI, ** = Significantat 99% CI
Reference category = GROUP 3
Variable (Group 2)	B	B (EXP)	P-Value	Lower Bound (EXP B)	Upper Bound (EXP B)
Runs Conceded	−0.033	0.967	0.363	0.901	1.039
Wickets Taken	1.069	2.913	0.021*	1.178	7.200
* = Significant at 95% CI, ** = Significant at 99% CI
Reference category = GROUP 1

Table 5. Correlation coefficients and fisher r to z values.

	Runs Conceded Ball 6 (Correlation)	P – Value(Correlation)	Fisher rz (grp 1)	Fisher rz (grp 2)	Fisher rz (grp 3)
Group 1 (18–24) Group 2 (25–31) Group 3 (32+)	r = 0.024 r = – 0.034 r = 0.136	0.916+ 0.793+ 0.658+	0.024--	-- 0.034-	--0.137
	Wickets Taken Death Bowling	P – Value(Correlation)	Fisher rz (grp 1)	Fisher rz (grp 2)	Fisher rz (grp 3)
Group 1 (18–24) Group 2 (25–31) Group 3 (32 +)	r = 0.642 r = 0.684 r = 0.514	0.046* 0.003** 0.193+	0.762--	-0.837-	--0.568