QUESTION 11 The lowa Department of Transportation repaired hundreds of bridges i

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QUESTION 11 The lowa 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 a 0:05 What is the null and alternate hypothesis? 0 A. H0: mu-25003 vs. Ha:mu not equal 25003 O B. HO: mu-25788 vs. Ha:mu not equal 25788 0 ?.?0: xbar-25003 vs. Ha:xbar not equal 25003 O D. H0: xbar-25788 vs. Ha:xbar not equal 25788 QUESTION 12 new light bulb is being considered for use in an office with computers. It is decided that the new bulb will only be

Explanation / Answer

Option - A) H0: mu = 25003 vs. Ha: mu not equal to 25003

            

                  

                       

                   

                     

                                 

                                  

                                     

                    

                                            

             

                    

                       

                    

             

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