he Iowa Department of Transportation repaired hundreds of bridges in 1993. To check the average cost to repair a bridge, a random sample of n = 55 bridges was chosen. The mean and standard deviation for the sample are $25,788 and $1,540, respectively. Records from previous years indicate an average bridge repair cost was $25,003. Use the sample data to test that the 1993 mean is greater than $25,003. Use α = 0.05. What is the null and alternate hypothesis? A. H0: mu=25788 vs. Ha:mu not equal 25788 B. H0: xbar=25788 vs. Ha:xbar not equal 25788 C. H0: xbar=25003 vs. Ha:xbar not equal 25003 D. H0: mu=25003 vs. Ha:mu not equal 25003
he Iowa Department of Transportation repaired hundreds of bridges in 1993. To check the average cost to repair a bridge, a random sample of n = 55 bridges was chosen. The mean and standard deviation for the sample are $25,788 and $1,540, respectively. Records from previous years indicate an average bridge repair cost was $25,003. Use the sample data to test that the 1993 mean is greater than $25,003. Use α = 0.05. What is the null and alternate hypothesis? A. H0: mu=25788 vs. Ha:mu not equal 25788 B. H0: xbar=25788 vs. Ha:xbar not equal 25788 C. H0: xbar=25003 vs. Ha:xbar not equal 25003 D. H0: mu=25003 vs. Ha:mu not equal 25003
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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The Iowa Department of Transportation repaired hundreds of bridges in 1993. To check the average cost to repair a bridge, a random sample of n = 55 bridges was chosen. The mean and standard deviation for the sample are $25,788 and $1,540, respectively. Records from previous years indicate an average bridge repair cost was $25,003. Use the sample data to test that the 1993 mean is greater than $25,003. Use α = 0.05.
What is the null and alternate hypothesis?
What is the null and alternate hypothesis?
| A. |
H0: mu=25788 vs. Ha:mu not equal 25788
|
|
| B. |
H0: xbar=25788 vs. Ha:xbar not equal 25788
|
|
| C. |
H0: xbar=25003 vs. Ha:xbar not equal 25003
|
|
| D. |
H0: mu=25003 vs. Ha:mu not equal 25003
|
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