Data were collected on lost-time accidents (mean work-hours lost per month over a period of 1 year) before and after an industrial safety program was put into effect at six industrial plants. Plant Number 3 4 Before Program 38 66 42 72 59 29 After Program 33 58 45 63 52 31 n USE SALT Do the data provide sufficient evidence to indicate whether the safety program was effective in reducing lost-time accidents? Test using a = 0.01. (Use uefare - Hafter = 4) State the null and alternative hypotheses. O H,: H. = 0 versus H: u4 # 0 O Ho: H = 0 versus H: 4, <0 O Ho: Ha <0 versus H: u> 0 O Ho: Hd = 0 versus H: ,>0 O H,: 4 * 0 versus H: 4 = 0 State the test statistic. (Round your answer to three decimal places.) t = State the rejection region. (If the test is one-tailed, enter NONE for the unused region. Round your answers to three decimal places.) t > State the conclusion. O H, is not rejected. There is insufficient evidence to indicate that the safety program was effective in reducing lost-time accidents. O H, is rejected. There is insufficient evidence to indicate that the safety program was effective in reducing lost-time accidents. O H, is not rejected. There is sufficient evidence to indicate that the safety program was effective in reducing lost-time accidents. O H, is rejected. There is sufficient evidence to indicate that the safety program was effective in reducing lost-time accidents.
Data were collected on lost-time accidents (mean work-hours lost per month over a period of 1 year) before and after an industrial safety program was put into effect at six industrial plants. Plant Number 3 4 Before Program 38 66 42 72 59 29 After Program 33 58 45 63 52 31 n USE SALT Do the data provide sufficient evidence to indicate whether the safety program was effective in reducing lost-time accidents? Test using a = 0.01. (Use uefare - Hafter = 4) State the null and alternative hypotheses. O H,: H. = 0 versus H: u4 # 0 O Ho: H = 0 versus H: 4, <0 O Ho: Ha <0 versus H: u> 0 O Ho: Hd = 0 versus H: ,>0 O H,: 4 * 0 versus H: 4 = 0 State the test statistic. (Round your answer to three decimal places.) t = State the rejection region. (If the test is one-tailed, enter NONE for the unused region. Round your answers to three decimal places.) t > State the conclusion. O H, is not rejected. There is insufficient evidence to indicate that the safety program was effective in reducing lost-time accidents. O H, is rejected. There is insufficient evidence to indicate that the safety program was effective in reducing lost-time accidents. O H, is not rejected. There is sufficient evidence to indicate that the safety program was effective in reducing lost-time accidents. O H, is rejected. There is sufficient evidence to indicate that the safety program was effective in reducing lost-time accidents.
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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Transcribed Image Text:Data were collected on lost-time accidents (mean work-hours lost per month over a period of 1 year) before and after an industrial safety program was put into effect at six industrial plants.
Plant Number
3
4
Before Program
38
66
42
72
59
29
After Program
33
58
45
63
52
31
n USE SALT
Do the data provide sufficient evidence to indicate whether the safety program was effective in reducing lost-time accidents? Test using a = 0.01. (Use uefare - Hafter = 4)
State the null and alternative hypotheses.
O H,: H. = 0 versus H: u4 # 0
O Ho: H = 0 versus H: 4, <0
O Ho: Ha <0 versus H: u> 0
O Ho: Hd
= 0 versus H: ,>0
O H,: 4 * 0 versus H: 4 = 0
State the test statistic. (Round your answer to three decimal places.)
t =
State the rejection region. (If the test is one-tailed, enter NONE for the unused region. Round your answers to three decimal places.)
t >
State the conclusion.
O H, is not rejected. There is insufficient evidence to indicate that the safety program was effective in reducing lost-time accidents.
O H, is rejected. There is insufficient evidence to indicate that the safety program was effective in reducing lost-time accidents.
O H, is not rejected. There is sufficient evidence to indicate that the safety program was effective in reducing lost-time accidents.
O H, is rejected. There is sufficient evidence to indicate that the safety program was effective in reducing lost-time accidents.
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