rsch and stat exam 2
All of the following factors are major considerations in recruiting participants, except:
20 percent of the population should be selected
Which of the following definitions best describes statistical power?
Probability that the test will reject the null hypothesis when it is false
Which of the following best describes samples in quantitative studies?
Sample size gives adequate power to show statistical significant difference
A type of probability sampling in which the sampling unit is a naturally occurring group of members of the population is _______
cluster sampling
Convenience sampling is not a type of purposive sampling.
True
Fifty percent of the scores are below the median.
True
Random sampling is that every element has an equal chance of being selected.
True
The mean of T-score distribution is 50.
True
The sample is representative of the population in which the characteristics are being studied.
True
The sampling frame is defined as the accessible population.
True
Which of the following is the correct definition of "focus group"?
An interview of a small group of participants
Data saturation is that new ideas are being generated from interviews and documents.
False
Inferential statistics are used when a sample is used to represent a population.
False
Percentile rank is a measure used in longitudinal studies.
False
Random sampling produces a high sampling error.
False
Sample refers to an entire group of people.
False
Studying a larger group over a longer period of time is the description of samples in qualitative research.
False
The range is a stable and trustworthy measure of score variability.
False
When the data distribution is normal, range should be used to measure variability.
False
When the data distribution is skewed, mode should be used to measure central tendency.
False
Random processes are important to the quality of research primarily because of which of the following reasons?
They assure the representativeness of the sample
A good study with a high degree of generalizability is likely to have used which of the following sampling techniques?
simple random sampling