c) find the standard test statistics

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 a = 0.10, answer parts (a) through (e). Assume the population variances are equal and the samples are random. If convenient, use technology to solve the problem. Treatment Tensile strengths (newtons per square millimeter) D Experimental 371 427 393 410 447 350 380 Conventional 379 449 428 424 448 352 437 400 406 421 (a) Identify the claim and state Ho and Ha The claim is "The new treatment | makes a difference in the tensile strength of the bars." What are Ho and Ha? The null hypothesis, Ho, is H1 = H2 The alternative hypothesis, Ha, is |H1 # H2 Which hypothesis is the claim? O The null hypothesis, Ho O The alternative hypothesis, Ha O (b) Find the critical value(s) and identify the rejection region(s). Enter the critical value(s) below C Click to select your answer(s)