Suppose the number of people entering a restaurant for dinner on any given day has mean 100 and standard deviation 20, and suppose that each person orders a total amount for food and drinks that is normally distributed with mean $25 and standard deviation $5. for each of the following scenarios, find the mean and standard deviation of the total revenue for the restaurant for dinner on a random evening. a. each person orders independently. b. the first person picks a meal and beverage, and everyone else orders the same thing (e. g., a group has booked the restaurant for a party).c. the correlation between any two people’s bills is -.3.d. the total number of people is known to be 100 and each person orders independently.

Name the quadrilaterals that have four equal sides.

For the chance to be team captain, the numbers 1-30 are put in a hat and you get two chances to pick a number, without replacement. which formula correctly shows how to find the probability that you choose the number 1 and then 2?

Which scenarios are most effectively explored by conducting an experiment? there is more than one correct answer. select all that apply. researchers want to study the effectiveness of a particular drug for treating migraines. they want to know which dosage of the drug yields the best results with the least side effects. to ensure fair results, the researchers want to ensure that participants and dosage administrators do not know which dosage participants receive. a teacher wants to plan a class fieldtrip and quickly determine where students prefer to go for the class fieldtrip. a car mechanic wants to know which of two engine brands makes better-performing engines. he wants to test the engines in identical situations and rate their performance in a way that can be fairly measured. a chemist studies the properties of a metal compound. she wants to know how the sample size of the metal affects its ability to conduct electricity. she wants to conduct the research in a controlled environment to minimize bias. a realty company wants to know the average income of its clients. the company wants to gather data income from current clients.