Homework 1.1 Answers Intro Stats 1.) A Sample is a part of the population 2.) It is usually too hard, time-consuming, and expensive to get the data from ALL objects 3.) A Parameter describes the population. A Statistic describes the sample. 4.) Descriptive and Inferential

12.) Sample – it is every fourth person 11.) Population – all members of House of Representatives 12.) Sample – it is every fourth person 13) Sample – you are only asking a portion of all the spectators 14.) Population – you would ask each lawyer 15) Sample - you are only asking a portion of the total patients 16.) Population – you would ask each household

22.) Population: ALL infants in Italy Sample: 33,043 infants in Italy 24.) Population: ALL computer users Sample: 1000 computer users 26.) Population: ALL students at a college Sample: 496 students at a college 28.) Population: ALL vacationers from the US Sample: 791 vacations from the US

30.) Statistics; it is a sample 32.) Parameter; it is all the governors 34.) Parameter; it is all new magazines 36.) Parameter; it is all graduates 38.) Descriptive statistic: Spend at least $2000 for their next vacation. Inferential statistic: People in the United States are planning to spend a lot (or little) on their next vacation.