An engineer wants to know if producing metal bars using a new experimental treatment rather than the conventional treatment makes a difference in the tensile strength of the bars (the ability to resist tearing when pulled lengthwise). At alphaequals0.05, answer parts (a) through (e). Assume the population variances are equal and the samples are random. If convenient, use technology to solve the problem. Experimental Treatment Conventional Treatment 432 445 398 404 356 387 417 446 404 367 372 409 420 354 431 431 401 Find the critical value(s) and identify the rejection region(s). Enter the critical value(s) below. 2.365 (Type an integer or decimal rounded to three decimal places as needed. Use a comma to separate answers as needed.) Part 5 Select the correct rejection region(s) below. A.t less than minus t 0 comma t greater than t 0 t less than minus t 0 comma t greater than t 0 B.negative t 0 less than t less than t 0 negative t 0 less than t less than t 0 C.t greater than t 0 t greater than t 0 D.t less than minus t 0 t less than minus t 0