MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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A large corporation wants to determine whether or not the "typing efficiency" course given at a
local college can increase the typing speed of their secretaries. A sample of 6 secretaries is selected,
and they are sent to take the course. The typing speeds of the secretaries in words per minute
(WPM) are shown below.
WPM
WPM
Secretary
Before the Course
After the Course
1
65
68
60
62
61
66
4
63
66
64
67
65
67
(a) At 95% confidence, test to determine if it can be concluded that taking the course will increase
typing speeds of the secretaries. State the null and alternative hypothesis
(b) Provide a 95% confidence interval for ud.
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Transcribed Image Text:A large corporation wants to determine whether or not the "typing efficiency" course given at a local college can increase the typing speed of their secretaries. A sample of 6 secretaries is selected, and they are sent to take the course. The typing speeds of the secretaries in words per minute (WPM) are shown below. WPM WPM Secretary Before the Course After the Course 1 65 68 60 62 61 66 4 63 66 64 67 65 67 (a) At 95% confidence, test to determine if it can be concluded that taking the course will increase typing speeds of the secretaries. State the null and alternative hypothesis (b) Provide a 95% confidence interval for ud.
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