For problems 1 – 5, determine the level of measurement (nominal, ordinal, interval, ratio) for each of the variables listed. 

Please note: each level of measurement may be used more than once, or not at all.

1. The hourly pay rates for employees in a large company.

2. Types of animals at a local animal shelter.

3. The category which best describes how frequently a person eats chocolate: Frequently, Occasionally, Seldom, Never.

4. Students’ letter grades on an exam.

5. The year in which each U.S. President first took office.

For the scenarios below, determine which sampling method was used (simple random, cluster, convenience, stratified, systematic)

a.) A company tests every 100th computer component manufactured to ensure quality control.

b.) A random sample of 75 voters from each voting district is surveyed to see how they will vote in an upcoming election.

c.) To learn about student satisfaction with cafeteria food on campus, the first 50 students coming out of the dining hall are surveyed.

d.) To determine parent satisfaction with curriculum changes, 3 schools from the local district are selected at random, and all parents at the selected schools are surveyed.

e.) To determine student satisfaction with advising services on campus, 35 students are randomly selected using their (unique) student ID numbers.