To compare the effect of stress caused by noise on the ability to perform a simple task, 74 subjects were divided into two groups-32 subjects as a control group, and 42 subjects as the experimental group. Although each subject performed the task, th experimental group had to perform the task while loud rock music was played. The time to finish the task was recorded for each subject and the following summary was obtained. n X S Control 32 17 minutes 5 minutes Experimental 42 25 minutes 11 minutes (a) Find a 99% confidence interval for the difference in mean completion times (in minutes) for these two groups. (Calculate the difference as the control group the experimental group. Round your answers to two decimal places.)
To compare the effect of stress caused by noise on the ability to perform a simple task, 74 subjects were divided into two groups-32 subjects as a control group, and 42 subjects as the experimental group. Although each subject performed the task, th experimental group had to perform the task while loud rock music was played. The time to finish the task was recorded for each subject and the following summary was obtained. n X S Control 32 17 minutes 5 minutes Experimental 42 25 minutes 11 minutes (a) Find a 99% confidence interval for the difference in mean completion times (in minutes) for these two groups. (Calculate the difference as the control group the experimental group. Round your answers to two decimal places.)
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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I need help finding the right answers question 9
![To compare the effect of stress caused by noise on the ability to perform a simple task, 74 subjects were divided into two groups-32 subjects as a control group, and 42 subjects as the experimental group. Although each subject performed the task, the
experimental group had to perform the task while loud rock music was played. The time to finish the task was recorded for each subject and the following summary was obtained.
n
S
Control
32
17 minutes
5 minutes
Experimental
42
25 minutes
11 minutes
(a) Find a 99% confidence interval for the difference in mean completion times (in minutes) for these two groups. (Calculate the difference as the control group - the experimental group. Round your answers to two decimal places.)
-13.09
X min to -2.92
X min](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbff43673-f06b-43ca-b409-46eb420ace6b%2F75bc48c4-7039-4a63-a924-36d285bd4c23%2Fzxt1hrc_processed.png&w=3840&q=75)
Transcribed Image Text:To compare the effect of stress caused by noise on the ability to perform a simple task, 74 subjects were divided into two groups-32 subjects as a control group, and 42 subjects as the experimental group. Although each subject performed the task, the
experimental group had to perform the task while loud rock music was played. The time to finish the task was recorded for each subject and the following summary was obtained.
n
S
Control
32
17 minutes
5 minutes
Experimental
42
25 minutes
11 minutes
(a) Find a 99% confidence interval for the difference in mean completion times (in minutes) for these two groups. (Calculate the difference as the control group - the experimental group. Round your answers to two decimal places.)
-13.09
X min to -2.92
X min
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