introduction, methodology, results, discussion
an observational study is one which consists of actual observation to record data and then analyse the data.
there are a number of factors that should be analyzed before starting an observational study.
the main four factors are:
i) introduction: this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study
methodology: the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.
results: then results such as summary of data with comments should be studied thoroughly
discussion: the last is the discussion, this can be either by management people or persons who are all interested , etc.
your answer is the frist one
54 km / hours
we need to convert seconds to hours
60 seconds = 1 minutes
60 minutes = 1hour
15 m 60 second 60 minutes
* * = 54000 meters/ hour
second 1 minute 1 hour
now we need to convert meters to km
1000 m = 1 km
54000 m 1 km
* = 54 km / hours
either 0 or 5....