Classify the following as a population or sample:

a. Two chimpanzees chosen to carry out genetic research.
b. Statistics 201 is a course taught at a university. Professor Rauch has taught nearly 1,500 students in the course over the past 5 years. You would like to know the average grade for the course.
c. Weather reports for each day of a month in a city for a study on that city's weather during that particular month.
d. To find how many books are published in one week by a famous publishing company.
e. To test a new drug produced by a biotech company.
f. To find the number of men and women working in an IT company with 600 people.
g. To estimate the average salary of doctors in California.

The population defines the whole group, while the sample is a part of the population. This means that the sample is less than the population. In statistical research, it is not always possible to study the whole population, unless it is not large. Most times, only the sample is studied and conclusions are then drawn about the population size based on the characteristics discovered about the sample size.