Rust

Added Example for `Statistical Functions` in Docs #46228

Job	Run time
build and run with wasm-pack	6m 26s
linux build test	3m 7s
cargo test (macos-aarch64)	13m 2s
Verify Vendored Code	57s
Check cargo fmt	43s
Verify MSRV (Min Supported Rust Version)	10m 5s
cargo check datafusion-common features	1m 7s
cargo check datafusion-proto features	4m 39s
cargo check datafusion-substrait features	9m 42s
cargo doc	4m 23s
cargo check datafusion features	12m 52s
verify benchmark results (amd64)	9m 37s
Run sqllogictest with Postgres runner	5m 37s
Run sqllogictest in Substrait round-trip mode	6m 10s
cargo test datafusion-cli (amd64)	4m 15s
cargo test (amd64)	18m 0s
cargo examples (amd64)	12m 35s
cargo test pyarrow (amd64)	4m 25s
clippy	4m 27s
cargo test doc (amd64)	20m 22s
check Cargo.toml formatting	3m 42s
check configs.md and ***_functions.md is up-to-date	4m 56s
cargo check datafusion-functions features	2m 45s
	2h 43m 54s

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