Mrs. Smith wanted to determine if the 7th grade students who received a passing grade spent more time studying than those students who failed. The dot plots below show the number of minutes spent studying for a test by randomly selecting 29 students’ names from a container of her 7th grade students who passed and students who failed.

What inference can be made about the population based on this data?

Mrs. Smith’s average 7th grade students who passed studies about 25 minutes more than the average students who failed.

Mrs. Smith’s average 7th grade students who passed or failed both study for 30 minutes.

Mrs. Smith’s average 7th grade students who failed did not have time to study after completing their chores.

Mrs. Smith’s average 7th grade students who failed studies 35 minutes less than the average 7th grade students who passed.

Acaterer knows he will need 60, 50, 80, 40 and 50 dinner napkins on five successive evenings. he can purchase new napkins initially at 25 cents each, after which he can have dirty napkins laundered by a fast one-day laundry service (i.e., dirty napkins given at the end of the day will be ready for use the following day) at 15 cents each, or by a slow two-day service at 8 cents each or both. the caterer wants to know how many napkins he should purchase initially and how many dirty napkins should be laundered by fast and slow service on each of the days in order to minimize his total costs. formulate the caterer’s problem as a linear program as follows (you must state any assumptions you make): a. define all variables clearly. how many are there? b. write out the constraints that must be satisfied, briefly explaining each. (do not simplify.) write out the objective function to be minimized. (do not simplify.)