IOP2601 – ORGANISATIONAL RESEARCH METHODOLOGY
MAY/JUNE 2018 EXAM MEMO
MEMO PREPARED BY E-STUDIES :
https://www.stuvia.co.za/user/e-studies
1. False
Notes:
IOP2601 focuses mainly on the data analysis step of the research process.
2. 10
1
,Notes:
The Y axis (vertical) represent the number of students, under each assignment score, we have the following number
of students:
1+3+1+1+1+0+2+1
= 10
3. 1
Notes: when we look at the dataset (1 + 3 + 1 + 1 + 1 + 0 + 2 + 1) , we see that the most frequent number is 1.
We get three different types of measures of center (central tendency) in a numerical data set incl. mean, median and
mode.
Mean: The "average" number; found by adding all data points and dividing by the number of data points.
Median: The middle number; found by ordering all data points and picking out the one in the middle (or if there are
two middle numbers, taking the mean of those two numbers). The median is usually abbreviated as Md.
Mode: The most frequent number—that is, the number that occurs the highest number of times. Bimodal is when
we have 2 modes. The mode is usually abbreviated as Mo.
4. 0
Notes: No students obtained a score of 6 (X axis – horizontal) based on the histogram
5. Statistical aptitude
Notes:
There are two main variables in an experiment, namely: independent and dependent variable
Independent variable: the variable that is changed or controlled in a scientific experiment to test the effects on a
dependent variable
Dependent variable: The variable being tested and measured in a scientific experiment.
The dependent variable is “dependent” on the independent variable.
2
, 6. 91
Σ𝑋 ! = 4! + 4! + 2! + 5! + 3! + 5! + 2! + 1! + 4! + 3!
= 125
7. 2
Range is the highest data value set – lowest data value set
=5–3
=2
8. 3,5
Median is the middle number of the data set. First we organize it from smallest to biggest and then find the middle
point. If there are two numbers in the middle, we add them together and divide them by 2.
X: 1 , 2 , 2 , 3 , 3 , 4 , 4 , 4 , 5, 5
=(3+4)/2
= 3,5
9. 1419
The sum of X times Y:
= ( 4 + 4 + 2 + 5 + 3 + 5 + 2 + 1 + 4 + 3) x ( 5 + 4 + 4 + 4 + 3 + 4 + 5 + 4 + 5 + 5)
= 1419
10. True
A correlation coefficient needs to be in a range of – 1 to 1.
11. True
Notes:
r = correlation coefficient:
Less than 0,5 is a weak relationship
Between 0,4 – 0,6 is an average relationship
3
MAY/JUNE 2018 EXAM MEMO
MEMO PREPARED BY E-STUDIES :
https://www.stuvia.co.za/user/e-studies
1. False
Notes:
IOP2601 focuses mainly on the data analysis step of the research process.
2. 10
1
,Notes:
The Y axis (vertical) represent the number of students, under each assignment score, we have the following number
of students:
1+3+1+1+1+0+2+1
= 10
3. 1
Notes: when we look at the dataset (1 + 3 + 1 + 1 + 1 + 0 + 2 + 1) , we see that the most frequent number is 1.
We get three different types of measures of center (central tendency) in a numerical data set incl. mean, median and
mode.
Mean: The "average" number; found by adding all data points and dividing by the number of data points.
Median: The middle number; found by ordering all data points and picking out the one in the middle (or if there are
two middle numbers, taking the mean of those two numbers). The median is usually abbreviated as Md.
Mode: The most frequent number—that is, the number that occurs the highest number of times. Bimodal is when
we have 2 modes. The mode is usually abbreviated as Mo.
4. 0
Notes: No students obtained a score of 6 (X axis – horizontal) based on the histogram
5. Statistical aptitude
Notes:
There are two main variables in an experiment, namely: independent and dependent variable
Independent variable: the variable that is changed or controlled in a scientific experiment to test the effects on a
dependent variable
Dependent variable: The variable being tested and measured in a scientific experiment.
The dependent variable is “dependent” on the independent variable.
2
, 6. 91
Σ𝑋 ! = 4! + 4! + 2! + 5! + 3! + 5! + 2! + 1! + 4! + 3!
= 125
7. 2
Range is the highest data value set – lowest data value set
=5–3
=2
8. 3,5
Median is the middle number of the data set. First we organize it from smallest to biggest and then find the middle
point. If there are two numbers in the middle, we add them together and divide them by 2.
X: 1 , 2 , 2 , 3 , 3 , 4 , 4 , 4 , 5, 5
=(3+4)/2
= 3,5
9. 1419
The sum of X times Y:
= ( 4 + 4 + 2 + 5 + 3 + 5 + 2 + 1 + 4 + 3) x ( 5 + 4 + 4 + 4 + 3 + 4 + 5 + 4 + 5 + 5)
= 1419
10. True
A correlation coefficient needs to be in a range of – 1 to 1.
11. True
Notes:
r = correlation coefficient:
Less than 0,5 is a weak relationship
Between 0,4 – 0,6 is an average relationship
3
