Question

Express the alternative hypothesis in symbolic form. An automobile technician claims that the mean amount of time​ (in hours) per domestic car repair is more than that of foreign cars. Assume that two samples are independent. Let the domestic car repair times be the first population and the foreign car repair times be the second population.

Answer 1

`H_(0)`: mu1-mu2=0

`H_(a)`: mu1-mu2>0

Explanation:

Let mu1 be the mean amount of time​ (in hours) per domestic car repair

and mu2 be the mean amount of time​ (in hours) per foreign car repair

According to the claim of the automobile technician, the mean amount of time​ (in hours) per domestic car repair is more than that of foreign cars.

Then null and alternative hypotheses can be stated in symbolic form as

• 
  `H_(0)`: mu1-mu2=0

• 
  `H_(a)`: mu1-mu2>0