1. The target population is all students in your university. You wish to estimate the average current Visa balance for each student. How large would the university student population have to be in order to be regarded as effectively infinite in each of the following samples?

Needed size of the student population (a) A sample of 34 students. (b) A sample of 68 students. (c) A sample of 97 students.

2. Below is a 6 8 array containing the ages of moviegoers. Treat this as a population.

32	34	33	12	57	13	58	16
23	23	62	65	35	15	17	20
14	11	51	33	31	13	11	58
23	10	63	34	12	15	62	13
40	11	18	62	64	30	42	20
21	56	11	51	38	49	15	21

(a) What was the proportion of all 48 moviegoers who were under age 35? (Round your answer to 2 decimal places.)

Proportion:

3. What type of data (categorical, discrete numerical, or continuous numerical) is each of the following variables?

(a) The manufacturer of your car:

(b) Your college major:

(c) The number of college credits you are taking:

4. What type of data (categorical, discrete numerical, or continuous numerical) is each of the following variables?

(a) Length of a TV commercial: (b) Number of peanuts in a can of Planter's Mixed Nuts: (c) Occupation of a mortgage applicant: (d) Flight time from London Heathrow to Chicago O'Hare:

5. What type of data (categorical, discrete numerical, or continuous numerical) is each of the following variables?

(a) The miles on your car's odometer: (b) The fat grams you ate for lunch yesterday: (c) The name of the airline with the cheapest fare from New York to London: (d) The brand of cell phone you own:

6. Which type of data (cross-sectional or time series) is each variable?

(a) Scores of 50 students on a midterm accounting exam last semester: (b) Bob's scores on 10 weekly accounting quizzes last semester: (c) Average score by all takers of the state's CPA exam for each of the last 10 years: (d) Number of years of accounting work experience for each of the 15 partners in a CPA firm: