Sediment Measurement

Range of Data

1^st Quartile

Median

3^rd Quartile

Nonparametric Test Results

*Comparison of Each

Strata to All Data

**Comparison between

the 3 Strata

Z-Statistic

P-Value

Chi-Square Statistic

P-Value

Total Phosphorus

0 to 40 m (ND)

0.029 to 0.428

0.099

0.185

0.257

4.646

<0.001

77.55

<0.001

>40 to 100 m (T)

0.096 to 1.215

0.195

0.329

0.982

2.419

0.016

>100 m (D)

1.008 to 1.447

1.204

1.301

1.368

5.581

<0.001

All Data

0.029 to 1.447

0.214

0.882

1.261

Sodium Hydroxide Extractable Phosphorus (PO₄NaOH)

0 to 40 m (ND)

0.006 to 0.066

0.015

0.027

0.038

4.803

<0.001

71.419

<0.001

>40 to 100 m (T)

0.006 to 0.201

0.037

0.051

0.120

1.971

0.049

>100 m (D)

0.062 to 0.285

0.146

0.194

0.243

5.240

<0.001

All Data

0.006 to 0.285

0.037

0.103

0.169

Biogenic Silica

0 to 40 m (ND)

0.313 to 7.932

0.816

1.996

5.293

4.655

<0.001

76.403

<0.001

>40 to 100 m (T)

0.182 to 34.671

3.151

6.363

17.494

2.308

0.021

>100 m (D)

17.622 to 105.792

28.838

45.692

72.124

5.554

<0.001

All Data

0.313 to 105.792

3.238

17.622

38.016

Organic Nitrogen

0 to 40 m (ND)

0.100 to 1.300

0.200

0.300

0.775

4.658

<0.001

72.696

<0.001

>40 to 100 m (T)

0.100 to 7.200

0.450

1.000

3.475

2.025

0.043

>100 m (D)

3.850 to 7.050

4.650

5.300

5.650

5.425

<0.001

All Data

0.100 to 7.050

0.525

3.100

4.900

Organic Carbon

0 to 40 m (ND)

0.400 to 6.170

0.815

2.550

3.590

4.659

<0.001

71.654

<0.001

>40 to 100 m (T)

0.500 to 48.510

2.425

5.908

22.225

2.056

0.040

>100 m (D)

25.980 to 40.550

32.300

34.350

37.620

5.537

<0.001

All Data

0.400 to 48.510

2.670

20.620

33.588