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STA 205 Exam 1 Questions with Correct Answers Latest Update 2025/2026

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STA 205 Exam 1 Questions with Correct Answers Latest Update 2025/2026 Population (definition) - Answers "all" values of interest Census - Answers Looks at every value N - Answers Population size Survey - Answers To take a sample Sample - Answers A specific number of values form the population (subset) n - Answers sample size Types of Samples - Answers -Convenient sample -Self-selected (volunteer) -Quota Sample -Random Sample Convenient Sample - Answers Easy to obtain Self-selected (volunteer) - Answers Participants choose o take part (ex. questionnaires, polls, surveys) Quota Sample - Answers Making the sample meet the percentages the population Random Sample - Answers Every single value in the population has the same opportunity of being selected Simple Sample - Answers 1-step Ex. drawing names from a hat Stratified Sample - Answers Several stages or steps of random sampling Categorical Data - Answers "category" Qulaitative Ex. gender, class, religion, favorite flavor of ice-cream *can only belong to one category at a time *Zip codes--even though its numerical Quantitative - Answers Measures the quantity numerical average is meaningful Ex. ages, incomes, distance, heights Population - Answers Any value calculated from the population are called Parameters Sample - Answers Any value calculated from the sample is called a statistic

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STA 205 Exam 1 Questions with Correct Answers Latest Update 2025/2026

Population (definition) - Answers "all" values of interest

Census - Answers Looks at every value

N - Answers Population size

Survey - Answers To take a sample

Sample - Answers A specific number of values form the population (subset)

n - Answers sample size

Types of Samples - Answers -Convenient sample

-Self-selected (volunteer)

-Quota Sample

-Random Sample

Convenient Sample - Answers Easy to obtain

Self-selected (volunteer) - Answers Participants choose o take part (ex. questionnaires, polls,
surveys)

Quota Sample - Answers Making the sample meet the percentages the population

Random Sample - Answers Every single value in the population has the same opportunity of
being selected

Simple Sample - Answers 1-step Ex. drawing names from a hat

Stratified Sample - Answers Several stages or steps of random sampling

Categorical Data - Answers "category" Qulaitative

Ex. gender, class, religion, favorite flavor of ice-cream

*can only belong to one category at a time

*Zip codes--even though its numerical

Quantitative - Answers Measures the quantity numerical average is meaningful

Ex. ages, incomes, distance, heights

Population - Answers Any value calculated from the population are called Parameters

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