UNIT 1
When and who developed the Cronbanch Alpha?
Cronbach Alpha was developed by Lee Cronbach back in 1951
Which sampling technique ensures every member of the population has an equal chance of being selected?
Simple random sampling
What defines experimental designs, also called true experimental design?
Randomization in sampling
What is the main purpose of experimental design according to Sytsma (2009)?
To interfere and create an alternative pathway for resear
It is the mathematical average of the cases
the median
What is the primary focus of face validity?
Appearance and purpose of a tool
What is a potential drawback of simple random sampling?
It can be inefficient for large populations.
Which variables play a role in modifying the relationship between the independent and dependent variables?
Control variables
What is a potential limitation of the pre-test post-test design mentioned by Hernández-Sampieri et al. (2014)?
Influence of other events on the final measurement
It is the most frequent frequently occurring value
the mode
Which statistical method compares group means for two independent groups?
Student’s t-test
In systematic sampling, participants are selected based on:
A fixed interval or "kth" unit.
In the context of research, what is a quasi-experimental design characterized by?
Practical and ethical barriers to randomization
According to Turner (2013), what is essential in a parallel group design?
Random assignment to different intervention groups
What do boxplots represent?
the interquartile range in a dataset
What does Cronbach Alpha measure?
Correlation among items on a scale
What is a key advantage of stratified sampling?
It allows for representation of specific population characteristics.
What is the purpose of randomization in sampling in experimental designs?
To ensure generalizability of results
What does a factorial research design investigate?
The impact of more than one independent variable
Which is the middle position of the distribution?
median
What does internal validity assess?
Causal relationship
Which sampling method divides the population into clusters based on naturally occurring criteria?
Cluster sampling
What role do moderating variables play in research designs?
They modify the relationship between independent and dependent variables
What is a key ethical consideration in survey research?
Informed consen
Which measure indicates how much a score deviates, in-on average, from the mean?
standard deviation