# Question

The mean amount spent by a family of four on food per month in U.S. is unknown, but we assume that the distribution of the food costs is normal. A research firm selected 100 families and found that the mean amount is $500 with a standard deviation of $75. What is the probability that a randomly selected family of four spends less than $480 per month? (Round your answer to 4 decimal places.)

## Answer to relevant Questions

Eight work centers must be arranges in an L-shaped building. The locations of centers 1 and 3 are assigned as shown. Assuming that transportation costs are $1 per load per meter, develop a suitable layout that minimizes ...Water is flowing into a hemispherical bowl of radius 5 feet at a constant rate of 1 cubic foot per minute.(a) At what rate is the top surface of the water rising when its height above the bottom of the bowl is 3 feet? 4 ...A medication contains 9 mg of active ingredients for every 1 mg of inert ingredients. How much of each kind of ingredient would be in a single 250-mg caplet?Consider the linear model with n observations y ~ N (Xβ, σ2In), since we have many predictors, β is a vector.(a) Write down the log-likelihood ℓ(β; y) of the model and the score U(β) = ∂ℓ/∂ β.(b) Under certain ...The vice president of a bank wishes to provide banking services so that the probability of the number of waiting customers being greater than 8 is less than .07. Would this condition be satisfied if the number of waiting ...Post your question

0