Using the information below, calculate the p-value for the imbedded 2-SampFTest
ID: 3216793 • Letter: U
Question
Using the information below, calculate the p-value for the imbedded 2-SampFTest and round to 4 decimal places.
An engineer suspects that the tensile strength of steel bars can be significantly increased by use of a new production method. In order to test this claim, he obtains the following data which represents the lbs/in^2 tensile strength.
..............Old Method......................... New Method............
362
352
380
382
395
389
421
394
384
400
378
419
389
402
422
416
384
388
372
383
400
386
411
405
413
379
407
402
389
411
408
362
352
380
382
395
389
421
394
384
400
378
419
389
402
422
416
384
388
372
383
400
386
411
405
413
379
407
402
389
411
408
Explanation / Answer
as discussed above we are required to do F test for which
hence F stat =(s1/s2)2 =(313.231/128.691)=2.4340
from above at 13 and 16 degree of freedom ; p[ value =0.0472
old new 362 395 352 389 380 421 382 394 384 389 400 402 378 422 419 416 384 400 388 386 372 411 383 405 413 407 379 402 389 411 408 Variance 313.231 128.691Related Questions
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