STAT 200 Week 1 Homework Problems
1.1.4 To estimate the percentage of households in Connecticut which use fuel oil as
a heating source, a researcher collects information from 1000 Connecticut
households about what fuel is their heating source. State the individual, variable,
population, sample, parameter, and statistic
1. Individual: Households in Connecticut
2. Variable: Percentage of households in Connecticut who use fuel oil as a
heating source
3. Population: Set of all responses of Connecticut households as to heating
source
4. Sample: Set of 1000 responses of Connecticut households as to heating
source
5. Parameter: Percentage of those who use fuel oil as heating source calculated
from the population of Connecticut households
6. Statistic: Percentage of people who use fuel oil as a heating source
calculated from the sample of 1000 Connecticut households.
, 1.1.8 The World Health Organization wishes to estimate the mean density of
people per square kilometer, they collect data on 56 countries. State the individual,
variable, population, sample, parameter, and statistic.
1. Individual: Single Country
2. Variable: Mean density of people per square kilometer from set of 56
countries of the world
3. Population: The set of all countries in the world
4. Sample: the 56 countries
5. Parameter: the mean density percentage of people per square kilometer from
the population
6. Statistic: The mean density of people per square kilometer from the 56
countries
1.2.4 You wish to determine the GPA of students at your school. Describe what
process you would go through to collect a sample if you use a stratified sample.
1. I would need to have groups of each grade, then I would randomly choose a
few student from each grade.
1.1.4 To estimate the percentage of households in Connecticut which use fuel oil as
a heating source, a researcher collects information from 1000 Connecticut
households about what fuel is their heating source. State the individual, variable,
population, sample, parameter, and statistic
1. Individual: Households in Connecticut
2. Variable: Percentage of households in Connecticut who use fuel oil as a
heating source
3. Population: Set of all responses of Connecticut households as to heating
source
4. Sample: Set of 1000 responses of Connecticut households as to heating
source
5. Parameter: Percentage of those who use fuel oil as heating source calculated
from the population of Connecticut households
6. Statistic: Percentage of people who use fuel oil as a heating source
calculated from the sample of 1000 Connecticut households.
, 1.1.8 The World Health Organization wishes to estimate the mean density of
people per square kilometer, they collect data on 56 countries. State the individual,
variable, population, sample, parameter, and statistic.
1. Individual: Single Country
2. Variable: Mean density of people per square kilometer from set of 56
countries of the world
3. Population: The set of all countries in the world
4. Sample: the 56 countries
5. Parameter: the mean density percentage of people per square kilometer from
the population
6. Statistic: The mean density of people per square kilometer from the 56
countries
1.2.4 You wish to determine the GPA of students at your school. Describe what
process you would go through to collect a sample if you use a stratified sample.
1. I would need to have groups of each grade, then I would randomly choose a
few student from each grade.
