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= 0.02, 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 388 390 413 412 446 365 431 Conventional 355 366 384 422 447 402 430 360 414 390 What are Ho and H,? The null hypothesis, Ho. is V. The alternative hypothesis, Ha, is Which hypothesis is the claim? O The alternative hypothesis, H, O The null hypothesis, Ho (b) Find the standardized test statistic. t-O (Type an integer or decimal rounded to the nearest thousandth as needed.) (c) Decide whether to reject or fail to reject the null hypothesis. the null hypothesis. (d) Interpret the decision in the context of the original claim. At the 2% significance level, V enough evidence to support the claim.

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= 0.02, 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 388 390 413 412 446 365 431 Conventional 355 366 384 422 447 402 430 360 414 390 What are Ho and H,? The null hypothesis, Ho. is V. The alternative hypothesis, Ha, is Which hypothesis is the claim? O The alternative hypothesis, H, O The null hypothesis, Ho (b) Find the standardized test statistic. t-O (Type an integer or decimal rounded to the nearest thousandth as needed.) (c) Decide whether to reject or fail to reject the null hypothesis. the null hypothesis. (d) Interpret the decision in the context of the original claim. At the 2% significance level, V enough evidence to support the claim.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

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 = 0.02,
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
388 390 413 412 446 365 431
Conventional
355 366 384 422 447 402 430 360 414 390
What are Ho and H?
The null hypothesis, Ho, is
. The alternative hypothesis, Ha, is
Which hypothesis is the claim?
The alternative hypothesis, Ha
The null hypothesis, Ho
(b) Find the standardized test statistic.
t 3D
(Type an integer or decimal rounded to the nearest thousandth as needed.)
(c) Decide whether to reject or fail to reject the null hypothesis.
the null hypothesis.
(d) Interpret the decision in the context of the original claim.
At the 2% significance level,
enough evidence to support the claim.

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