To calculate the Mean, Variance and the Standard Deviation input the numbers in the text box separating each number with ONE (1) SPACE ONLY. Then press 'Get Results'

Calculate the Mean, Variance, and Standard Deviation

1. Copy and paste the following code between your HEAD tags:-

<style type="text/css">

</style>

for (i=0;i<str.length-1;i++)
{if (str.charAt(i)==" " & str.charAt(i+1)==" "){alert("Only ONE space between numbers, please!");SD.textarea.focus();return false;}
}
if (str.charAt(0)==" "){alert("No spaces at beginning, please!");SD.textarea.focus();return false;}
if (str.charAt(str.length-1)==" "){alert("No spaces at the end, please!");SD.textarea.focus();return false;}
var tot,vary1
tot=0;max=0;

for (i=0;i<SD.decimal.length;i++)
{if (SD.decimal[i].selected){deci=i;}
if (SD.decimal[i].selected){deci=i;}
}

for (i=0;i<arr.length;i++)
{dataItem[i]=eval(arr[i]);
vary=vary+(dataItem[i]-m)*(dataItem[i]-m);
}
vary1=(vary/(arr.length-1)).toFixed(deci);
std=eval((Math.sqrt(vary/(arr.length-1))));

mean.innerHTML="1). Arithmetic Mean (Average) = "+m.toFixed(deci);
variance.innerHTML="2). Variance = "+vary1;

stdev1.innerHTML="3). One standard deviation from the mean = ±"+std.toFixed(deci);

stdev2.innerHTML="4). Two standard deviations from the mean = ±"+(std*2).toFixed(deci);

range.innerHTML="5). Data range: "+min+" to "+max+" ="+(max-min+1)+" (inclusive)";
}
</script>

2. Copy and paste the following code between your BODY tags where you want the input displayed:
<div style="position:absolute; left:?; top:?">
<p><table width=90% border=0 bordercolor=#cccccc cellspacing="0" cellpadding="12"><tr><td>
<p>To calculate the Mean, Variance and the Standard Deviation input the numbers in the text box <span style="color:#ff0000">separating each number with ONE (1) SPACE ONLY</span>. Then press 'Get Results'
<form name="SD">
<fieldset style="font-size:12;border-color:#000000">
<legend align="center" style="font-size:14;"><b>Mean, Variance, Standard Deviation, Range</b></legend>
<fieldset>
<legend>Data</legend>
<input type="text" name="textarea" size=50>
</fieldset>
<center><fieldset>
<legend></legend>
Decimal Places: 
<select name="decimal">
<option>0</option>
<option selected>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
<option>5</option>
<option>6</option>
<option>7</option>
<option>8</option>
<option>9</option>
</select>
<input type="button" value="Get Results" style="cursor:hand;color:#0000ff" onClick="GetResults()"><a href="www.datedial.com/datStandard_Deviation.asp"></a>
</fieldset></center>
<fieldset>
<legend style="color:#ff0000">Results</legend>
<p id="mean"></p>
<p id="variance" style="color:#0000ff"></p>
<p id="stdev1" style="color:#0000ff"></p>
<p id="stdev2" style="color:#0000ff"></p>
<p id="range"></p>
</fieldset></fieldset>
</td></tr></table>
</div>

<p>You can position the display whereever you like. You change the "left" and "top" values in the "div" tag above to whatever values you need. 
<p>a) "top" is the vertical distance of the top left corner of the display starting at zero. The higher the number the lower down the page.
<p>b) "left" is the horizontal distance of the top left corner of the display starting at zero. The higher the number the further across the page.
<p>c) You can change also the color of the display and the background.

<p>If you have any problems or questions please email us at wsmith112@hotmail.com.

<p>Linking Information:-
TITLE: Calculate the Mean, Variance, and Standard Deviation
URL : http://www.datedial.com/datStandard_Deviation.asp
DESCRIPTION : Calculate the mean, variance, and standard deviation of a set of data.