Chapter 14 Statistical analysis

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Chapter 14 Statistical analysis

The statistics approach

Probabilistic statement formats

Probabilistic statements

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

Relational

Comparative

Descriptive

Measures of centreal tendency and dispersion

On average and descrpiptive statistics meaning?

Dispersion

Standard deviation

Variance

Range

Central tendency

Median

Mode

Mean