Day 2 Flashcards
(12 cards)
Define statistics?
A way of understanding and observing variability.
What is the definition of a variable and variability?
Variables are an n event or behavior that has at least two values. Variability is the degree to which we find differences among scores for a variable with a particular set of individuals.
What is A statistic?
Number of computed on a sample; a statistic is a way of describing a sample.
What is a parameter?
Computed on a population or estimated using sample statistics;a parameter describes a pop.
Understand Descriptive and inferential statistics?
Descriptive stats are statistics that a sample.
Inferential stat are drawing larger conclusions on population.
What is observational and relational (correlational) research?
Observational-intended just to describe a particular group of people;e in some point in time.
Relational(correlational)- understanding relationship between/among variables.
What is experiment research?
designed to describe specifically for casual relationships under controlled conditions.
What is correlational research?
Two different variables are measured for each individual in the sample and the relationship between them is examined.
During experimental research , describe independent and dependent variable?
Independent variable- the thing being manipulated.
Dependent variable- observing this variable, behavior or characteristics.
Explain Expermental conditions, controlled connnditions and mesurments?
Experimental conditions- where we change something and see if there is an effect.
Control condition- is the baseline condition
Scale of measurement:nominal scale and ordinal scale
Nominal-Label and categorize observations with no quantitive distinctions (color,gender)
Ordinal- Categories organized in an ordered sequence term of size or magnitude(year in school, place in race)
Scale of measurement continued: interval and ratio scale
Interval- ordered categories that are all intervals of exactly the same size, arbitrary zero( can be zero or lower, like Fahrenheit temp.)
Scale/ratio- interval scale with an absolute zero point, meaningful ratios.(height,weight)
