A company has 50 employees all working in the same building. As part of their safety procedures, a fire drill is carried out with the total number
of employees who have left the building recorded every 10 seconds.
The results are displayed in the cumulative frequency diagram below.
The company has the following
policy: "In the event of a fire, at least
90% of the employees must have
left the building within 1 minute."
Cumulative frequency
Did the fire drill procedure meet the
policy above?
You must show all your working.

introduction, methodology, results, discussion

step-by-step explanation:

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.

add 5 subtract 1

step-by-step explanation: