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Statistics & Parameters: Week 8 by Mind Map: Statistics & Parameters:  Week
8
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Statistics & Parameters: Week 8

Parameter

Summary Characteristic of Population

Population Parameter

Parameter associated with population/Not sample

Statistic

Number computed from sample of values taken from larger population

Sample Estimate

Used to estimate unknown value of population parameter

Statistical Inference

Preocedures for making conclusions about population parameters

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

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

Used for poupulation means

x-bar/d-bar

Notation for sample means

p

Used for population proportions

p-hat

Used for sample proportions

Big 5 Parameters

One population proportion (or probability)

What proportion or percentage....?

Difference in two population proportions

Compare some feature of two populations

One population mean

Average of variable for everyone in population

Population mean for paired differences

Differences for entire population of possible pairs.

Difference in two population means

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

Sampling Distribution

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

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