Online Statistics Calculators - Solvers
ยป Normal Distribution Probability Calculations
You can Use this calculator if you want to compute a probabilities associated with the normal distribution. You need to know the population mean μ
and the population standard deviation σ. You need to provide information about the event you want to compute the probability. The script will also provide a picture of the shaded area.
[insert_php]
$root_path = "/home/timeofwa/homeworkfactory.com";
require_once $root_path . "/wp-content/php_includes/FormFunctions.php";
$solver_name = "normalcalculation";
echo_form_start(); //Start form with its styling
echo_anchor_results(); //The point where the browser will scroll for the results
echo_begin_div_table(750);
input_line('Population Mean (\(\mu\))','mean',100,45); //Basic input line for text
input_line('Population St. Dev. (\(\sigma\))','sigma',101); //Basic input line for text
echo_end_div_table();
probability_event_input(102); //Function to define a probabilistic event
echo_hidden_input($solver_name); //Sometimes used for validation, it may disappear
include "adsinc/mathcracker-responsive1.php";
echo_submit("Calculate",106); //Submit button
echo_form_end(); //Ends form
[/insert_php]
[insert_php]
if ($_SERVER['REQUEST_METHOD'] == 'POST' && $_POST[$solver_name] == $solver_name){
//*******************************
//We retrieve POST parameters
//*******************************
$mean = $_POST['mean'];
$sigma = $_POST['sigma'];
$tail = $_POST['tail'];
if($tail=='twotailed'){
$lower = $_POST['LeftLimitTwoTailed'];
$upper = $_POST['RightLimitTwoTailed'];
}
elseif($tail=='lefttailed'){
$lower = '';
$upper = $_POST['RightLimit'];
}
else{
$lower = $_POST['LeftLimit'];
$upper = '';
}
//******************************************************
//CALL THE REQUIRED PHP LIBRARIES
//******************************************************
require_once $root_path . "/wp-content/MathLibraries/Solver_NormalProbabilityClass.php";
//****************************************
//RENDER THE SOLUTION AND ERRORS
//****************************************
try{
//**************************************************
//INSTANTIATE OBJECT, ECHO STEPS AND ERRORS
//**************************************************
$oSolver = new NormalProbabilityCalculator($mean, $sigma, $tail, $lower, $upper);
$oSolver->EchoSteps();
$oSolver->EchoSpecificErrors();
}
catch(Exception $e){
echo "Something went wrong: ", $e->getMessage(), "\n";
}
}
[/insert_php]
