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An engineer wants to determine the effectiveness of a safety program. He collects annual loss of hours due to accidents in 12 plants before and after the program was put into operation. After 112 Plant Before 129 Plant Before 95 After 99 7 2 116 117 103 104 8 99 71 3 79 82 4 109 88 10 64 79 5 77 75 11 68 65 6. 98 86 12 107 100 E Click here for the Excel Data File Let the difference be defined as Before - After. a. Specify the competing hypotheses that determine whether the safety program was effective. O Ho: HD= 0; HA Ho#0 O Ho: HDS0; HA: HD>O O Ho: HDZ 0; HA HD

An engineer wants to determine the effectiveness of a safety program. He collects annual loss of hours due to accidents in 12 plants before and after the program was put into operation. After 112 Plant Before 129 Plant Before 95 After 99 7 2 116 117 103 104 8 99 71 3 79 82 4 109 88 10 64 79 5 77 75 11 68 65 6. 98 86 12 107 100 E Click here for the Excel Data File Let the difference be defined as Before - After. a. Specify the competing hypotheses that determine whether the safety program was effective. O Ho: HD= 0; HA Ho#0 O Ho: HDS0; HA: HD>O O Ho: HDZ 0; HA HD

MATLAB: An Introduction with Applications
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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Plant Before After
1 129 112
2 116 103
3 117 104
4 109 88
5 77 75
6 98 86
7 95 99
8 99 71
9 79 82
10 64 79
11 68 65
12 107 100
An engineer wants to determine the effectiveness of a safety program. He collects annual loss of hours due to accidents in 12 plants before and after the program was put into operation. TTTI Plant Before After Plant Before After 1 129 112 7 95 99 2 116 103 8 99 71 3 117 104 9 79 82 4 109 88 10 64 79 5 77 75 11 68 65 98 86 12 107 100 E Click here for the Excel Data File Let the difference be defined as Before – After. a. Specify the competing hypotheses that determine whether the safety program was effective. O Ho: HD= 0; HA: HD#O Ho: HDS 0; HAi HD>0 O Ho: HDZ 0; HA HD<O b-1. Calculate the value of the test statistic. Assume that the hours difference is normally distributed. (Round intermediate calculations to at least 4 decimal places and final to 2 decimal places.) Test statistic
Transcribed Image Text:An engineer wants to determine the effectiveness of a safety program. He collects annual loss of hours due to accidents in 12 plants before and after the program was put into operation. TTTI Plant Before After Plant Before After 1 129 112 7 95 99 2 116 103 8 99 71 3 117 104 9 79 82 4 109 88 10 64 79 5 77 75 11 68 65 98 86 12 107 100 E Click here for the Excel Data File Let the difference be defined as Before – After. a. Specify the competing hypotheses that determine whether the safety program was effective. O Ho: HD= 0; HA: HD#O Ho: HDS 0; HAi HD>0 O Ho: HDZ 0; HA HD<O b-1. Calculate the value of the test statistic. Assume that the hours difference is normally distributed. (Round intermediate calculations to at least 4 decimal places and final to 2 decimal places.) Test statistic
b-2. Find the p-value. O 0.01 s p-value < 0.025 O p-value < 0.01 O p-value 2 0.10 O 0.05 s p-value < 0.10 O 0.025 s p-value < 0.05 c. At the 5% significance level, is there sufficient evidence to conclude that the safety program was effective? O Yes, since we reject HO. O No, since we do not reject HO. Yes, since we do not reject HO. O No, since we reject HO.
Transcribed Image Text:b-2. Find the p-value. O 0.01 s p-value < 0.025 O p-value < 0.01 O p-value 2 0.10 O 0.05 s p-value < 0.10 O 0.025 s p-value < 0.05 c. At the 5% significance level, is there sufficient evidence to conclude that the safety program was effective? O Yes, since we reject HO. O No, since we do not reject HO. Yes, since we do not reject HO. O No, since we reject HO.
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