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Statistics & Parameters: Week
8
by David Warwick
# Statistics & Parameters: Week
8

## Parameter

### Summary Characteristic of
Population

### Population Parameter

## Statistic

### Number computed from sample of
values taken from larger
population

### Sample Estimate

## Statistical Inference

### Preocedures for making
conclusions about population
parameters

## Curiosity Diagram

### Curiosity about something

### Question about a parameter

### Collect data appropriate for
that parameter

### Make inference about the
value of the parameter

## Useful terms

### mew

### x-bar/d-bar

### p

### p-hat

## Big 5 Parameters

### One population proportion (or
probability)

### Difference in two population
proportions

### One population mean

### Population mean for paired
differences

### Difference in two population means

## Sampling Distribution

### Probability distribution of possible values of
the statistic for repeated samples of the
same size taken from the same population.

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range from 0 to 5

Parameter associated with population/Not sample

Used to estimate unknown value of population parameter

Confidence Intervals, Interval of values that should cover true, unknown value

Hypothesis tests, Uses sample data to attempt to reject a hypothesis about a population., Null Value, Value indicating nothing of interest is happening., Statistical Significance, Rejecting the idea that observed results are plausible if null value is correct

Used for poupulation means

Notation for sample means

Used for population proportions

Used for sample proportions

What proportion or percentage....?

Compare some feature of two populations

Average of variable for everyone in population

Differences for entire population of possible pairs.

Estimate value of difference of mean/test hypothesis that difference is 0

Standard deviation of x-bar, Standard deviation of sampling distribution of sample mean

Standard deviation of p-hat, Standard deviation of sampling distribution of a sample proportion

Standard Error, Describes estimated value of standard deviation of a statistic