In stratified random sampling, the population is first divided up into mutually exclusive and collectively exhaustive groups, called strata. A stratified sample includes randomly selected observations from each stratum, which are proportional to the stratum’s size. True / False.

During which of the following phases of the business cycle does the real gdp fall? a. trough b. expansion c. contraction d. peak

Problem 3: access control pokeygram, a cutting-edge new email start-up, is setting up building access for its employees. there are two types of employees: managers and engineers, and there are three departments: security, networking, and human resoures. each employee works in a single department, and each department is housed on a different floor. managers are allowed access to any floor, while engineers are allowed access only to their own floor. there are three badge-operated elevators, each going up to only one distinct floor. every employee has one badge. pokeygram wants to use the best possible access control method in order to minimize delay for the elevators (a) access control matrix, 1. which of the following would you recommend that pokeygram use: (b) access control lists, or (c) capabilities? make sure to justify your answer. 2. what, if any, would be the benefits (and/or disadvantages) of using rbac (role-based access control) in this situation? keep your solution for this problem limited to 10-12 lines of text.

How is a federal loan different from a private loan for an education? a federal loan is available for any student who meets the government's lending standards. a private loan is only available for students who show a need. a federal loan is only available for students who show a need. a private loan is available for any student who meets the bank's lending standards. a federal loan can only be used to pay for a student's tuition. a private loan can be used to pay for a student's tuition and any other expenses. a federal loan can be used to pay for a student's tuition and any other expenses. a private loan can only be used to pay for a student's tuition.