1. Define the appropriate population from which the following samples have been drawn:

(a) Fifty employees from a manufacturing company are asked if they would like the company to have some training program for all employees.

(b) A quality control engineer of a semiconductor company randomly selects 10 chips from a batch to examine their quality.

(c) One hundred voters from a large metropolitan area are asked for their opinion about the location of the proposed airport.

2. The monthly entertainment expenses to the nearest dollar of 10 college students randomly selected from a university with 10,000 students are as follows:

48 46 33 40 29 38 37 37 40 48 Determine the mean and standard deviation of these data.