1). Name and
describe the measures of central tendency
MEAN
- It is the arithmetic average of the set.
- It is calculated by summing all values, then dividing by the
number of values
- It is greatly affected by extreme values.
MEDIAN
- It is defined as the middle value when observations are ordered
from smallest to largest
- It is also known as the 50th percentile.
- It is commonly used robust and resistant measure of central
tendency.
MODE
- It is the most frequent score in the data set.
- mode is not unique
- mode will not provide a very good measure of central
tendency
2). Describe the role and job requirements of
fieldworkers.
- fieldworkers have to be highly flexible
- fieldworkers have to be good communicators
- fieldworkers have to be reliable and accurate
- fieldworkers have to be organised
- fieldworkers should be aware of data protection