A study was conducted by Grade 11 STEM students to investigate the health hazards of working long hours in front of a computer or word processor video displays. It found out that it took an average of 2.6 hours before a certain symptom of eye strain developed. If a similarexperiment done by Grade 12 STEM students using a sample of 15 people had a mean of 2.8 hours, with standard deviation of 1.25 hours, would this indicate that the G11 STEM students results are different with the G12 STEM students results? Use 5% level of significance.
A study was conducted by Grade 11 STEM students to investigate the health hazards of working long hours in front of a computer or word processor video displays. It found out that it took an average of 2.6 hours before a certain symptom of eye strain developed. If a similarexperiment done by Grade 12 STEM students using a sample of 15 people had a mean of 2.8 hours, with standard deviation of 1.25 hours, would this indicate that the G11 STEM students results are different with the G12 STEM students results? Use 5% level of significance.
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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Answer 1-3 thank youu
Transcribed Image Text:1. Which is the correct null hypothesis that can be derived in the
situation? *
It will take an average of greater than 2.6 hours before a certain symptom of eye
strain developed on people.
It will take an average of 2.6 hours before a certain symptom of eye strain developed
on people.
It will take an average of less than 2.6 hours before a certain symptom of eye strain
developed on people.
It will not take an average of 2.6 hours before a certain symptom of eye strain
developed on people.
2. Which is the correct alternative hypothesis that can be derived in the
situation? *
It will not take an average of 2.6 hours before a certain symptom of eye strain
developed on people.
It will take an average of greater than 2.6 hours before a certain symptom of eye
strain developed on people.
It will take an average of 2.6 hours before a certain symptom of eye strain developed
on people.
It will take an average of less than 2.6 hours before a cert ain symptom of eye strain
developed on people.
3. What test will be used based from the given values in the situation? *
1-test since n<30 and o is unknown
z-test since n>30 and o is unknown
1-test since n3D30 and o is known
z-test since n2 30 and o is known
Transcribed Image Text:A study was conducted by Grade 11 STEM students to investigate the health hazards of working long
hours in front of a computer or word processor video d isplays. It found out that it took an average of 2.6
hours before a certain symptom of eye strain developed. If a similarexperiment done by Grade 12 STEM
students using a sample of 15 people had a mean of 2.8 hours, with standard deviation of 1.25 hours,
would this indicate that the G11 STEM students results are different with the G12 STEM students results?
Use 5% level of significance.
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