Struct ZTestFn 

pub struct ZTestFn;

Returns the one-tailed p-value of a z-test against hypothesized mean x.

Z.TEST evaluates whether the sample mean is significantly greater than the target value.

Remarks

• Uses provided sigma when supplied; otherwise computes population standard deviation.
• Returns #NUM! when sigma <= 0.
• Returns #DIV/0! when implied standard deviation is zero.
• Returns #N/A when the data array has no numeric values.

Examples

title: "Z-test with provided sigma"
formula: "=Z.TEST({1,2,3,4,5},2,1)"
expected: 0.012673659338734137

title: "Z-test with sigma estimated from sample"
formula: "=Z.TEST({1,2,3,4,5},2)"
expected: 0.056923149003329065

Trait Implementations

impl Debug for ZTestFn

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

Formats the value using the given formatter.

impl Function for ZTestFn

[formualizer-docgen:schema:start] Name: Z.TEST Type: ZTestFn Min args: 2 Max args: variadic Variadic: true Signature: Z.TEST(arg1: number@range, arg2: number@scalar, arg3…: 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=scalar,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} 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 variadic(&self) -> bool

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 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.