peartiger386Lv1
29 Nov 2021
Problem 42
Page 557
Section: PRACTICE
Chapter 10: HYPOTHESIS TESTING WITH TWO SAMPLE
Textbook ExpertVerified Tutor
29 Nov 2021
Given information
Use the following information to answer the next five exercises. Two metal alloys are being considered as material for ball bearings. The mean melting point of the two alloys is to be compared. pieces of each metal are being tested. Both populations have normal distributions. The following table is the result. It is believed that Alloy Zeta has a different melting point.
Step-by-step explanation
Step 1.
This is a two-tailed test because nothing is said about the direction and the alternate hypothesis is testing for the difference in melting points of alloys.
Therefore, it is a two-tailed test.
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