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Posted: November 8th, 2022
What is the null and alternate hypothesis
he Iowa Department of Transportation repaired hundreds of bridges in 1993. To check the average cost to repair a bridge, a random sample ofn = 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. Useα = 0.05.What is the null and alternate hypothesis?A.H0: mu=25788 vs. Ha:mu not equal 25788B.H0: xbar=25003 vs. Ha:xbar not equal 25003C.H0: xbar=25788 vs. Ha:xbar not equal 25788D.H0: mu=25003 vs. Ha:mu not equal 25003
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