Statistic With Singing Sand

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Are singing sand (ss) and non-

singing sand (ns) have different

size?

From our question,

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Hypothesis (Hypotheses)

Singing and Non-singing sand have differentsize.

Singing sand is bigger than non-singing sand.

>

Singing sand is smaller than non-singing

sand.

SS NS

SS NS

SS NS

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What do you want to do to

answer the question or prove

if your hypothesis is right?

Mean/average

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What are the parameters in

descriptive statistic ?

Mean 0.57 Standard Error

0.049579935

Median 0.55

Mode 0.54

Standard Deviation

0.210349849

Sample Variance

0.044247059

Kurtosis -0.45259628

Skewness 0.216033915 Range 0.76

Minimum 0.23

Maximum 0.99

Sum 10.26 Count 18

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The term Central tendency

refers to middle value or

perhaps a typical value thedata, and is mean, median,

or mode. Each of these

measures is calculateddifferently, and the one that is

one that is best to use

depends upon the situation.

Central Tendency

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Mean

= population mean

X = sample mean

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Median

Median

is in theMiddle

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Mode

mode

is the

mostpopular

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Copyright 2000 by Monica Yuskaitis

Mode

The most popular or thatwhich is in fashion.

Baseball caps are a mode today.

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Mean = Median = Mode

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skewness

Left-skewed right-skewed

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Hypothesis Testing

Hypothesis testing is a way of systematically

quantifying how certain you are of the result

of a statistical experiment.

Let focus on singing sand experiment : )

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Hypothesis Testing

Is also called significance testing

Testsa claim about a parameter using

evidence

The procedure is broken into four steps

Each element of the procedure must be

understood

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A. Null and Alternative Hypotheses

Convert the research question to null and

alternative hypotheses

The null hypothesis (H0) is a claim ofno

difference in the population

The alternative hypothesis (Ha) claims H0 is

false

Collect data and seek evidence against H0 as a

way of bolstering Ha (deduction)

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