Struct TTestFn 

pub struct TTestFn;

Returns the p-value from a Student t-test comparing two numeric samples.

T.TEST supports paired, equal-variance two-sample, and unequal-variance (Welch) modes.

Remarks

• tails must be 1 (one-tailed) or 2 (two-tailed).
• type must be 1 (paired), 2 (two-sample equal variance), or 3 (Welch).
• Returns #N/A when paired mode arrays have different lengths.
• Returns #NUM! or #DIV/0! for invalid setup or degenerate variance conditions.

Examples

title: "Two-tailed equal-variance test with identical samples"
formula: "=T.TEST({1,2,3},{1,2,3},2,2)"
expected: 1

title: "One-tailed Welch test with identical samples"
formula: "=T.TEST({1,2,3},{1,2,3},1,3)"
expected: 0.5

Trait Implementations

impl Debug for TTestFn

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Function for TTestFn

[formualizer-docgen:schema:start] Name: T.TEST Type: TTestFn Min args: 4 Max args: 4 Variadic: false Signature: T.TEST(arg1: number@range, arg2: number@range, arg3: number@scalar, arg4: number@scalar) Arg schema: arg1{kinds=number,required=true,shape=range,by_ref=false,coercion=NumberLenientText,max=None,repeating=None,default=false}; arg2{kinds=number,required=true,shape=range,by_ref=false,coercion=NumberLenientText,max=None,repeating=None,default=false}; arg3{kinds=number,required=true,shape=scalar,by_ref=false,coercion=NumberLenientText,max=None,repeating=None,default=false}; arg4{kinds=number,required=true,shape=scalar,by_ref=false,coercion=NumberLenientText,max=None,repeating=None,default=false} Caps: PURE [formualizer-docgen:schema:end]

fn caps(&self) -> FnCaps

Capability flags for this function

fn name(&self) -> &'static str

fn aliases(&self) -> &'static [&'static str]

Optional list of additional alias names (case-insensitive) that should resolve to this function. Default: empty slice. Implementors can override to expose legacy names. Returned slice must have ’static lifetime (typically a static array reference).

fn min_args(&self) -> usize

fn arg_schema(&self) -> &'static [ArgSchema]

fn eval<'a, 'b, 'c>( &self, args: &'c [ArgumentHandle<'a, 'b>], _ctx: &dyn FunctionContext<'b>, ) -> Result<CalcValue<'b>, ExcelError>

The unified evaluation path.

fn namespace(&self) -> &'static str

fn variadic(&self) -> bool

fn volatile(&self) -> bool

fn function_salt(&self) -> u64

fn eval_reference<'a, 'b, 'c>( &self, _args: &'c [ArgumentHandle<'a, 'b>], _ctx: &dyn FunctionContext<'b>, ) -> Option<Result<ReferenceType, ExcelError>>

Optional reference result path. Only called by the interpreter/engine when the callsite expects a reference (e.g., range combinators, by-ref argument positions, or spill sources).

fn dispatch<'a, 'b, 'c>( &self, args: &'c [ArgumentHandle<'a, 'b>], ctx: &dyn FunctionContext<'b>, ) -> Result<CalcValue<'b>, ExcelError>

Dispatch to the unified evaluation path with automatic argument validation.