Eight situations are described where observation is a suitable, and sometimes the most suitable form of research. Name three of these situations and explain in each case why observation is a suitable...

Eight situations are described where observation is a suitable, and sometimes the most suitable form of research. Name three of these situations and explain in each case why observation is a suitable research method.

Establish a counting system to record the number of people present at a cultural venue or event site at hourly intervals during the course of its opening hours. Estimate the number of visitor-hours at the site for the day.