填空题

填空题 The lecture will be useful for students who are writing ______.

填空题 Developed countries are described by the speaker as ______.

填空题 The size of a sample depends on the______required.

填空题 Questions 24-30 :

Types of Survey	Advantages	Disadvantages
Mail	(24)	Not good for decent response rate
	Good for particular groups
Telephone	Good for when time and survey length are limited	(25)
In-person	Good for collecting complex infor- mation	Can mean lots of (26)
Street Interview	(27)	Not scientific sampling

Survey Content Questions can ask about: opinions and attitudes factual characteristics or behaviour
Questions can be open-ended or (28) .
Questions can be from 5 minutes to 1 hour+long
Survey can be a (29) -interviewees can be questioned on 2 or more occasions
Ethics Results must not be used commercially
Individuals should not be mentioned
Results should be in (30) ie: statistical tables or charts