Question

C Get Homework Help With Chegx W7: MyStatLab Homework - MA C W7: MyStatLab Homework-MA X C W7: MyStatLab Homework- MA Untitled document-Google Do X x https://upperiowa.brightspace.com/d21/le/content/69473/view Content/739442/View Classcraft Chapter 4 Rocks an.. Glencoe Virtual Lab. Glencoe Mineral a40 GAO-18-147, BURE. The Impact of Job.. NAbstracts Databas. Volcano Explorer tgpsb.org bookmarks 6/29/19 10:05 PM Elementary Statistics (4) James Nichols& Homework: Section 8.2 Homework Save HW Score: 72.84 % , 6.56 of 9 pts Score: 0.44 of 1 pt 9 of 9 complete)Y ( 8.2.19 Question Help 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 answer parts (a) through (e). Assume the population variances are equal and the samples are random. If convenient, use technology to solve the aring when pulled lengthwise) problem Treatment Tensile strengths (newtons per square millimeter) Experimental 389 440 438 413 371 380 428 Conventional 6 357 409 426 374 381 352 446 (a) Identify the claim and state Ho and Ha in the tensile strength of the bars." The claim is "The new treatment Click to select your answer(s) and then click Check Answer. parts Clear All Final Check remaining 1 10:05 Sign out

1.The claim is​ "The new treatment ________in the tensile strength of the​ bars."

2.What are H0 and Ha​?

3.Which hypothesis is the​ claim?

4.Find the critical​ value(s) and identify the rejection​ region(s).

5.Select the correct rejection​ region(s) below.

6.Find the standardized test statistic.

Answer 1

1. The claim is The new treatment increses in the tensile strength of the bars.

2.H0: The mean tensile strength of the bars is the same for both the new and conventional methods

Ha: The mean tensile strength of the bars by new method is more than by conventional method

3. The claim is the alternative hypothesis (ie)Ha

4.The critical value is t for right tailed at 2 ℅ level with 15 df is 2.2485

5.The rejection region is |t|>2.2485

6. The test statistic is given as

(N,-1)s(N1)s)( N1N2-2 Il

The value of t is 0.994

Since t is less than t_cric , we accept H0 and conclude that there is no significant difference in the tensile strength of the bars produced by 2 methods at 2 ℅ level of significance