Oefenweb /
php-statistics
| @@ 317-326 (lines=10) @@ | ||
| 314 | * |
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| 315 | * @return void |
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| 316 | */ |
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| 317 | public function testVarianceSampleIntegers() |
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| 318 | { |
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| 319 | $values = [2, 4, 4, 4, 5, 5, 7, 9]; |
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| 320 | $sample = true; |
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| 321 | ||
| 322 | $actual = Statistics::variance($values, $sample); |
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| 323 | $expected = 4.571429; |
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| 324 | ||
| 325 | $this->assertEqualsWithDeltaPolyfill($expected, $actual); |
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| 326 | } |
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| 327 | ||
| 328 | /** |
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| 329 | * Tests `variance`. |
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| @@ 335-344 (lines=10) @@ | ||
| 332 | * |
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| 333 | * @return void |
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| 334 | */ |
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| 335 | public function testVarianceSampleFloats() |
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| 336 | { |
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| 337 | $values = [0.0, 0.25, 0.25, 1.25, 1.5, 1.75, 2.75, 3.25]; |
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| 338 | $sample = true; |
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| 339 | ||
| 340 | $actual = Statistics::variance($values, $sample); |
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| 341 | $expected = 1.428571; |
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| 342 | ||
| 343 | $this->assertEqualsWithDeltaPolyfill($expected, $actual); |
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| 344 | } |
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| 345 | ||
| 346 | /** |
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| 347 | * Tests `variance`. |
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| @@ 353-362 (lines=10) @@ | ||
| 350 | * |
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| 351 | * @return void |
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| 352 | */ |
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| 353 | public function testVariancePopulationIntegers() |
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| 354 | { |
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| 355 | $values = [2, 4, 4, 4, 5, 5, 7, 9]; |
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| 356 | $sample = false; |
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| 357 | ||
| 358 | $actual = Statistics::variance($values, $sample); |
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| 359 | $expected = 4; |
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| 360 | ||
| 361 | $this->assertSame($expected, $actual); |
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| 362 | } |
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| 363 | ||
| 364 | /** |
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| 365 | * Tests `variance`. |
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| @@ 404-413 (lines=10) @@ | ||
| 401 | * |
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| 402 | * @return void |
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| 403 | */ |
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| 404 | public function testStandardDeviationSampleIntegers() |
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| 405 | { |
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| 406 | $values = [2, 4, 4, 4, 5, 5, 7, 9]; |
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| 407 | $sample = true; |
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| 408 | ||
| 409 | $actual = Statistics::standardDeviation($values, $sample); |
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| 410 | $expected = 2.13809; |
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| 411 | ||
| 412 | $this->assertEqualsWithDeltaPolyfill($expected, $actual); |
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| 413 | } |
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| 414 | ||
| 415 | /** |
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| 416 | * Tests `standardDeviation`. |
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| @@ 422-431 (lines=10) @@ | ||
| 419 | * |
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| 420 | * @return void |
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| 421 | */ |
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| 422 | public function testStandardDeviationSampleFloats() |
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| 423 | { |
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| 424 | $values = [1.5, 2.5, 2.5, 2.75, 3.25, 4.75]; |
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| 425 | $sample = true; |
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| 426 | ||
| 427 | $actual = Statistics::standardDeviation($values, $sample); |
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| 428 | $expected = 1.081087; |
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| 429 | ||
| 430 | $this->assertEqualsWithDeltaPolyfill($expected, $actual); |
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| 431 | } |
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| 432 | ||
| 433 | /** |
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| 434 | * Tests `standardDeviation`. |
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| @@ 440-449 (lines=10) @@ | ||
| 437 | * |
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| 438 | * @return void |
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| 439 | */ |
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| 440 | public function testStandardDeviationPopulationIntegers() |
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| 441 | { |
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| 442 | $values = [2, 4, 4, 4, 5, 5, 7, 9]; |
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| 443 | $sample = false; |
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| 444 | ||
| 445 | $actual = Statistics::standardDeviation($values, $sample); |
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| 446 | $expected = 2.0; |
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| 447 | ||
| 448 | $this->assertSame($expected, $actual); |
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| 449 | } |
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| 450 | ||
| 451 | /** |
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| 452 | * Tests `standardDeviation`. |
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| @@ 458-467 (lines=10) @@ | ||
| 455 | * |
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| 456 | * @return void |
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| 457 | */ |
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| 458 | public function testStandardDeviationPopulationFloats() |
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| 459 | { |
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| 460 | $values = [1.5, 2.5, 2.5, 2.75, 3.25, 4.75]; |
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| 461 | $sample = false; |
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| 462 | ||
| 463 | $actual = Statistics::standardDeviation($values, $sample); |
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| 464 | $expected = 0.9868; |
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| 465 | ||
| 466 | $this->assertEqualsWithDeltaPolyfill($expected, $actual); |
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| 467 | } |
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| 468 | ||
| 469 | /** |
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| 470 | * Tests `range`. |
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