MATH 124 CH. 1, 2, 3 Exam questions
n answers graded A+
Population - correct answer ✔✔ the entire group of individuals
Sample - correct answer ✔✔ -a part of the population that we actually examine in order to
gather info
-representative of the population
-results from this sample can be generalized
Sampling Frame - correct answer ✔✔ a list of every individual in the population
individual - correct answer ✔✔ a member of the population of interes
variable - correct answer ✔✔ an aspect of an individual subject or object being measured
parameter - correct answer ✔✔ a number measurement describing data from a population
-For a set population, parameter NEVER changes
parameter--> u
statistic - correct answer ✔✔ a numerical measurement describing some characteristic of a
sample
, qualitative data - correct answer ✔✔ aka CATEGORICAL DATA, based on description of physical,
preferences
Graphs: pareto chart, pie chart, bar graph
Quantitative data - correct answer ✔✔ Data associated with mathematical models and
statistical techniques used to analyze spatial location and association
Graphs: Pareto chart, histogram, bar graph, pie chart, stem & leaf plot
Sampling Design: Simple Random Sample (SRS) - correct answer ✔✔ -every individual has the
same chance of being picked
-every subset has an equal chance of being selected
-like putting names in a hat
Advantages: it's easy, randomness reduces bias
Disadvantages: may not be representative which leads to large variation, sampling frame
required
Sampling Design: Stratified Random Sample - correct answer ✔✔ -population is divided into 2
homogeneous groups called strata
-strata don't have to be the same size
-restrictions not bound by location
-SRS's are pulled from each strata
-like having multiple hats
n answers graded A+
Population - correct answer ✔✔ the entire group of individuals
Sample - correct answer ✔✔ -a part of the population that we actually examine in order to
gather info
-representative of the population
-results from this sample can be generalized
Sampling Frame - correct answer ✔✔ a list of every individual in the population
individual - correct answer ✔✔ a member of the population of interes
variable - correct answer ✔✔ an aspect of an individual subject or object being measured
parameter - correct answer ✔✔ a number measurement describing data from a population
-For a set population, parameter NEVER changes
parameter--> u
statistic - correct answer ✔✔ a numerical measurement describing some characteristic of a
sample
, qualitative data - correct answer ✔✔ aka CATEGORICAL DATA, based on description of physical,
preferences
Graphs: pareto chart, pie chart, bar graph
Quantitative data - correct answer ✔✔ Data associated with mathematical models and
statistical techniques used to analyze spatial location and association
Graphs: Pareto chart, histogram, bar graph, pie chart, stem & leaf plot
Sampling Design: Simple Random Sample (SRS) - correct answer ✔✔ -every individual has the
same chance of being picked
-every subset has an equal chance of being selected
-like putting names in a hat
Advantages: it's easy, randomness reduces bias
Disadvantages: may not be representative which leads to large variation, sampling frame
required
Sampling Design: Stratified Random Sample - correct answer ✔✔ -population is divided into 2
homogeneous groups called strata
-strata don't have to be the same size
-restrictions not bound by location
-SRS's are pulled from each strata
-like having multiple hats
