qbank_statistics\helper Class Reference

Static Public Member Functions
static	calculate_average_question_discrimination_index (int $questionid)
	Calculate average discriminative efficiency. More...
static	calculate_average_question_discriminative_efficiency (int $questionid)
	Calculate average discriminative efficiency. More...
static	calculate_average_question_facility (int $questionid)
	Calculate average facility index. More...
static	format_discrimination_index (?float $value)
	Format discrimination index (Needs checking?). More...
static	format_percentage (?float $number, bool $fraction=true, int $decimals=2)
	Format a number to a localised percentage with specified decimal points. More...
static	get_quizzes (int $questionid)
	Return ids of all quizzes that use the question. More...
static	load_question_stats_item (int $quizid, int $questionid, string $item)
	Load a specified stats item for a question. More...

Member Function Documentation

calculate_average_question_discrimination_index()

static qbank_statistics\helper::calculate_average_question_discrimination_index ( int  $questionid )

static

Calculate average discriminative efficiency.

Parameters

int

$questionid

question id

Return values

float|null

calculate_average_question_discriminative_efficiency()

static qbank_statistics\helper::calculate_average_question_discriminative_efficiency ( int  $questionid )

static

Calculate average discriminative efficiency.

Parameters

int

$questionid

question id

Return values

float|null

calculate_average_question_facility()

static qbank_statistics\helper::calculate_average_question_facility ( int  $questionid )

static

Calculate average facility index.

Parameters

int

$questionid

Return values

float|null

format_discrimination_index()

static qbank_statistics\helper::format_discrimination_index ( ?float  $value )

static

Format discrimination index (Needs checking?).

Parameters

float | null

$value

stats value

Return values

array

format_percentage()

static qbank_statistics\helper::format_percentage ( ?float  $number, bool  $fraction = true, int  $decimals = 2  )

static

Format a number to a localised percentage with specified decimal points.

Parameters

float | null	$number	The number being formatted
bool	$fraction	An indicator for whether the number is a fraction or is already multiplied by 100
int	$decimals	Sets the number of decimal points

Return values

string

Exceptions

coding_exception

get_quizzes()

static qbank_statistics\helper::get_quizzes ( int  $questionid )

static

Return ids of all quizzes that use the question.

Parameters

int

$questionid

id of the question

Return values

array

list of quizids

Exceptions

dml_exception

load_question_stats_item()

static qbank_statistics\helper::load_question_stats_item ( int  $quizid, int  $questionid, string  $item  )

static

Load a specified stats item for a question.

Parameters

int	$quizid	quiz id
int	$questionid	question id
string	$item	a stats item

Return values

float|int

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The documentation for this class was generated from the following file:

• question/bank/statistics/classes/helper.php