Measures of centreal tendency and dispersion
On average and descrpiptive statistics meaning?
Central tendency
Mean
Mode
Median
Dispersion
Range
Variance
Standard deviation
Probabilistic statements
Descriptive
Comparative
Relational
The basis of probabilistic statements:the normal distribution
Theory: Theoretical idea of drawing repeated samples of the same size from the same population.The values found from the sample will fall within a certain range either side of the true population value--hence the idea of confidence intervals.The theory related to the bell-shaped normal distribution which would result if repeated samples were drawn and the values of a statistic plotted.
Normal curve
Probabilistic statement formats