The error associated with both measurement devices ensures that there will be variance in both sets of measurements. 18 0 obj << /Linearized 1 /O 20 /H [ 880 275 ] /L 95053 /E 80092 /N 4 /T 94575 >> endobj xref 18 22 0000000016 00000 n PDF Multiple groups and comparisons - University College London In each group there are 3 people and some variable were measured with 3-4 repeats. Using Confidence Intervals to Compare Means - Statistics By Jim Example of measurements: Hemoglobin, Troponin, Myoglobin, Creatinin, C reactive Protein (CRP) This means I would like to see a difference between these groups for different Visits, e.g. To determine which statistical test to use, you need to know: Statistical tests make some common assumptions about the data they are testing: If your data do not meet the assumptions of normality or homogeneity of variance, you may be able to perform a nonparametric statistical test, which allows you to make comparisons without any assumptions about the data distribution. The Anderson-Darling test and the Cramr-von Mises test instead compare the two distributions along the whole domain, by integration (the difference between the two lies in the weighting of the squared distances). Statistical significance is arbitrary it depends on the threshold, or alpha value, chosen by the researcher. Air quality index - Wikipedia If you've already registered, sign in. ; Hover your mouse over the test name (in the Test column) to see its description. If the two distributions were the same, we would expect the same frequency of observations in each bin. columns contain links with examples on how to run these tests in SPSS, Stata, SAS, R and MATLAB. Also, is there some advantage to using dput() rather than simply posting a table? Economics PhD @ UZH. Hb```V6Ad`0pT00L($\MKl]K|zJlv{fh` k"9:1p?bQ:?3& q>7c`9SA'v GW &020fbo w% endstream endobj 39 0 obj 162 endobj 20 0 obj << /Type /Page /Parent 15 0 R /Resources 21 0 R /Contents 29 0 R /MediaBox [ 0 0 612 792 ] /CropBox [ 0 0 612 792 ] /Rotate 0 >> endobj 21 0 obj << /ProcSet [ /PDF /Text ] /Font << /TT2 26 0 R /TT4 22 0 R /TT6 23 0 R /TT8 30 0 R >> /ExtGState << /GS1 34 0 R >> /ColorSpace << /Cs6 28 0 R >> >> endobj 22 0 obj << /Type /Font /Subtype /TrueType /FirstChar 32 /LastChar 121 /Widths [ 250 0 0 0 0 0 778 0 333 333 0 0 250 0 250 0 0 500 500 0 0 0 0 0 0 500 278 0 0 0 0 0 0 722 667 667 0 0 556 722 0 0 0 722 611 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 444 0 444 500 444 0 0 0 0 0 0 278 0 500 500 500 0 333 389 278 0 0 0 0 500 ] /Encoding /WinAnsiEncoding /BaseFont /KNJJNE+TimesNewRoman /FontDescriptor 24 0 R >> endobj 23 0 obj << /Type /Font /Subtype /TrueType /FirstChar 32 /LastChar 118 /Widths [ 250 0 0 0 0 0 0 0 0 0 0 0 0 0 250 0 0 0 0 0 0 0 0 0 0 0 333 0 0 0 0 0 0 611 0 0 0 0 0 0 0 333 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 500 0 444 500 444 0 500 500 278 0 0 0 722 500 500 0 0 389 389 278 500 444 ] /Encoding /WinAnsiEncoding /BaseFont /KNJKAF+TimesNewRoman,Italic /FontDescriptor 27 0 R >> endobj 24 0 obj << /Type /FontDescriptor /Ascent 891 /CapHeight 0 /Descent -216 /Flags 34 /FontBBox [ -568 -307 2028 1007 ] /FontName /KNJJNE+TimesNewRoman /ItalicAngle 0 /StemV 0 /FontFile2 32 0 R >> endobj 25 0 obj << /Type /FontDescriptor /Ascent 905 /CapHeight 718 /Descent -211 /Flags 32 /FontBBox [ -665 -325 2028 1006 ] /FontName /KNJJKD+Arial /ItalicAngle 0 /StemV 94 /XHeight 515 /FontFile2 33 0 R >> endobj 26 0 obj << /Type /Font /Subtype /TrueType /FirstChar 32 /LastChar 146 /Widths [ 278 0 0 0 0 0 0 0 333 333 0 0 278 333 278 278 0 556 556 556 556 556 0 556 0 0 278 278 0 0 0 0 0 667 667 722 722 0 611 0 0 278 0 0 556 833 722 778 0 0 722 667 611 0 667 944 667 0 0 0 0 0 0 0 0 556 556 500 556 556 278 556 556 222 0 500 222 833 556 556 556 556 333 500 278 556 500 722 500 500 500 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 222 ] /Encoding /WinAnsiEncoding /BaseFont /KNJJKD+Arial /FontDescriptor 25 0 R >> endobj 27 0 obj << /Type /FontDescriptor /Ascent 891 /CapHeight 0 /Descent -216 /Flags 98 /FontBBox [ -498 -307 1120 1023 ] /FontName /KNJKAF+TimesNewRoman,Italic /ItalicAngle -15 /StemV 83.31799 /FontFile2 37 0 R >> endobj 28 0 obj [ /ICCBased 35 0 R ] endobj 29 0 obj << /Length 799 /Filter /FlateDecode >> stream
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