SAMPLE TYPE
Each member of the population has an equal probability of being selected as part of the sample group.
What is simple random sample?
A study based on data in which no manipulation of factors has been employed.
What is Observational study?
the arithmetic average of a distribution, obtained by adding the scores and then dividing by the number of scores
What is Mean?
A value that "lies outside" (is 1.5 times smaller or larger than) most of the other values in a set of data.
What is an outlier?
A precise, testable statement of what the researchers predict will be the outcome of the study.
What is a hypothesis?
A population is divided into groups, then SOME members are randomly selected from each group.
What is stratified sample?
A study based on data that manipulates factor levels to create treatments, randomly assigns subjects to these treatments
What is Experimental study?
the middle score in a distribution; half the scores are above it and half are below it
What is Median?
a graphical device that summarizes data by the number of dots above each data value on the horizontal axis
What is a Dot Plot?
The group that receives the REAL treatment.
What is the treatment group?
A population is divided into groups, then ALL members of one or more (NOT ALL) of the groups are selected as part of the sample group.
What is a cluster sample?
A study that uses counts or measures of the entire population.
What is a Census?
the most frequently occurring score(s) in a distribution
What is Mode?
A way to model random events in a statistical study, such that simulated outcomes closely match real-world outcomes in a safer or more efficient way.
What is simulations?
A hypothesis which predicts no difference between the results from the different conditions of an experiment.
What is a Null Hypothesis?
The population is ordered in some way and even nth member is chosen for the sample group.
What is Systematic sample?
A study that selects a subset of the population to estimate the characteristics of the whole population.
What is Sampling?
the difference between the highest and lowest scores in a distribution
What is range?
A hypothesis which predicts difference between the results from the different conditions of an experiment.
This can mean something is different, incorrect, or has changed.
What is an Alternative Hypothesis?
An experimental study that is done in such a way that both the primary researcher and the subjects (patients) do not know which subjects are receiving he placebo or the actual treatment.
This is done to ensure the results are not affected by a placebo effect and also helps ensure that the researcher doesn't have bias.
What is Double Blind?
The sample group is chosen from the population who are readily available or 'convenient'.
What is convenience sample?
An experimental study that is done in such a way that the patients or subjects do not know if they are receiving the placebo or the actual treatment but the researcher does know which subjects are receiving.
This is done to ensure the results are not affected by a placebo effect
What is a Blind Study?
the difference between the first and third quartiles
What is IQR?
An analytical technique that accounts for the number of acceptable errors in an experiment.
What is Margin of Error?
The beneficial effect produced by a placebo that cannot be attributed to the properties of the placebo itself and must therefore be due to the patient's belief in the treatment.
What is the Placebo Effect?