EFFECT OF VITAMINS C AND E INTAKE ON BLOOD ... - EuroJournals

European Journal of Social Sciences - Volume 2, Number 1 (2006)
and Obafemi Awolowo University (OAU). The two state universities are: Olabisi Onabanjo University
(OOU) and Ladoke Akintola University of Technology (LAUTECH). The study population consisted
of lecturers in the ten universities. They constituted the universe to be sampled. The four universities
were selected using stratified and random sampling techniques. The ten universities were first stratified
into federal and state universities before two each were randomly selected from each stratum.
Selection of Respondents
The method used to draw out sampled respondents was the stratified and random sampling techniques.
The total number of lecturers in each University was divided into the existing seven strata: Professors
(Prof), Associate Professors (Ass. P), Senior Lecturers (S.L.), Lecturer I (L1), Lecturer II (L11),
Assistant Lecturers (A.L.), and Graduate Assistant (G.A.). A simple random sampling technique was
used to select respondents from each stratum. To get a proportional sample fraction from each stratum
in each university, at least ten percent of the lecturers in each stratum were randomly selected. In this
way, each group in the population was represented. The combination of these sub-samples from all the
strata in all the universities constitutes the sample size.
The Sample Size
Table 1: Distribution of respondents (Res.) by Universities
Rank No in
O.O.U O.O. U F.U.T.A. F.U.T.A. LAUTECH LAUTECH O.A.U. . OA.U Total Total
Group
No of
Res.
No in
Group
No of Res No in Group No of Res. No in
6
Group
No of
Res.
No in
Group
Prof 45 5 32 3 22 9 187 39 286 56
Ass. P 26 4 8 1 5 1 78 16 117 22
S.L 70 8 62 6 24 10 196 40 352 64
Ll 110 11 54 6 48 20 215 45 427 82
Lll 106 11 61 7 57 23 112 24 336 65
A.L 128 13 70 8 82 27 145 30 425 78
G.A 68 9 37 4 136 44 84 18 325 75
Total 553 61 324 35 374 134 1017 212 2268 442
Source: Field Survey 2003.
Table 1 shows that there were 2268 lecturers in the four universities. Copies of the questionnaire were
distributed to 600 respondents but 442 were completed and returned, as shown in Table 2 below.
No of
Res.