Use the following to answer the next two questions (questions 19 and 20). A runn

Question

Use the following to answer the next two questions (questions 19 and 20). A running shoe company claims their shoe will withstand an average lifetime distance of 600 miles. For quality assurance purposes they randomly sample 5 shoes from each batch and test their wear through simulation. If the sample provides evidence the entire batch has a mean below 600 miles, they will need to further investigate the batch of shoes. Otherwise, they will prepare them for market They know the population of all wear lifetimes is normal and vary 50 miles, on average. The sample yielded an average of 535 miles Question 19 8 pts What is the unknown parameter of interest in this example? The population standard deviation ?. the average lifetime distance in miles for the sample of shoes. O Al the average lifetime distance in miles for the entire batch of shoes O None of the above

Explanation / Answer

As we can see that the company is interested in finding out the average lifetime distance the shoes can bear,hence the parameter of interest here will be: u,the average lifetime distance in miles for the entire batch of shoes.

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