A box model is used to conduct a hypothesis test for the following scenario: A marketing rm randomly selects 300 households in a town asking about their annual income. They want to test whether the average household income in the town is $88,000 annually. The average of the ticket values in the box assuming the null hypothesis is true is best described as... 0 Random and known 0 Random and unknown; it must be estimated 0 Fixed and unknown; it must be estimated 0 Fixed and known