Q SCI 381 B, Winter 2015
Homework 1 Solutions

15 points were awarded for the survey
Each question below is worth 1 point for a total of 17 points

From Page 6:
13) Sample – the 500 spectators are a subset of the 42,000 spectators
16) Population – all TVs in the US are counted
19) Population – all US presidents are considered
20) Sample – 10 locations are selected from a landscape

From Page 7:
35) Statistic – the average is from a subset of 35 from 1200 accountants
37) Parameter – 62 of a total of 97 passengers

From Page 13:
7) Quantitative – height is measured by a number
9) Qualitative – eye color is a category
12) Qualitative – species is a classification or label
14) Quantitative – wait times are measured in units of time.

From Page 15:
27) Qualitative and ordinal
28) Qualitative and nominal
30) Quantitative and interval
32) Quantitative and ratio
From Pages 25-26:
23) Simple random – because phone numbers are chosen at random at each number has an equal chance of being chosen. The sample may be biased because telephone sampling only samples people with telephones, and if they are available and willing to respond.
24) Stratified – because both urban and rural people are selected. The two strata are urban and rural. Bias could be an issue since a smaller percentage of the urban population will be asked relative to the percentile of rural people. However, asking enough people, regardless of background population density (urban vs. rural) may overcome this bias.
26) Cluster – the entire grid is divided into 200 clusters from which 30 grids are randomly selected. A potential bias could be that households in certain grids may have been more damaged depending on the trajectory of the hurricane (i.e., beach front properties vs. inland homes). A potential solution is to use a cluster design but then consider strata within