30 years old father are taller than 12 year old daughter. It is an example of
1). cross-sectional study
2). case study
3). experimental study
4). vertical study
2. Reliability in a test refers to
5. A research hypothesis cannot take the following form
6. the yearbook has the detail contents of
7. Which one of the following sampling type is used in operations test to select the units?
9. Which of the following is a primary source of data?
10. Step deviation method to estimate arithmetic mean can be applied only when