The fat content (in percentage) of 12 randomly selected hot dogs was measured by scientists:
18.3, 22.6, 28.3, 17.4, 21.6, 22.4, 24.7, 20.9, 29.8, 21.3, 23.6, 25.8
(a) Construct a 95% confidence interval for the population mean fat content. State any
necessary assumptions for your Cl to be valid.
(b) Is there sufficient evidence to conclude that the mean fat content is less than 25%.
You may find the following R code helpful:
x = c(18.3, 22.6, 28.3, 17.4, 21.6, 22.4, 24.7, 20.9, 29.8, 21.3, 23.6, 25.8)
mean(x)
sd(x)

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?

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.)

Choose the correct translation for the following statement. it is at most ten. x< 10 x< 10 x> 10 x> 10