Question

o 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 = 0.01, 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) Experimental 424 388 436 420 450 415 379 Conventional 350 417 367 396 381 359 400 411 411 377 (a) Identify the claim and state Ho and H The claim is "The new treatment makes a difference in the tensile strength of the bars." What are Ho and H.? The null hypothesis, Ho, is H1 H2 The alternative hypothesis, H., IS H1*12 Click to select your answer(s).

Answer 1

Question is answered below.

Ex perement , 424, 388,436, 420, 450, uLS ( 379. conventtorial 350, 417, 3571395, 38/ 3591 400,ull, u111 377. 7 a 416 si = 25.133 2 385.8 9 ss 9 24.629 Formula used ł = Ex do {ea )2 n-1 (a) the claim is 'The new treatment makes # a difference" in the tensile strength of bars. # The null hypothesis , Ho is feliz # The alternative hypothesis Ha Mi 7 de

which Date: 1 Page No. : is clair te enough evdened to support the clatin # hypotheses is o alternatin hypotheses, Ha 6 Critical value(s) = 19.94 2.947 Corred refecher region oc t - to, ty to test statistie a = all-n, J (nr 1) sz+ (n 1957 ) (+, ++) 0125133) 133) + (10-1) (24.629) 13.6937) (** 2.46787 9.4 671 we fail to reject) the null hypothesis fel At the 1% level of significanes, there is not nito, 2 Here 7+10-2 fo