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STA 296 Exam 1 UKY Questions and Complete Solutions Graded A+
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STA 296 Exam 1 UKY Questions and Complete Solutions Graded A+
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STA 296 Exam 1 UKYQuestions and Complete
Solutions Graded A+
Statistics - Answer: is the science of collecting, organizing, summarizing, and analyzing information to
draw conclusions to answer questions.
Variable - Answer: a characteristic that is recorded for each case.
Categorical Variable - Answer: when each observation belongs to one set of categories.
Quantitative Variable - Answer: if observations on it take numerical measures of individuals.
Population - Answer: the group they would like to learn about.
Sample - Answer: a small group from the population thats examined.
Parameter - Answer: a numerical value summarizing the population data.
Statistic - Answer: a numerical value summarizing the sample data.
Population Mean Notation - Answer: μ
Sample Mean Notation - Answer: x̅
Population Standard Deviation Notation - Answer: σ
, Sample Standard Deviation Notation - Answer: s
Population Proportion Notation - Answer: p
Sample Proportion Notation - Answer: p̂
Population Correlation Notation - Answer: ρ
Sample Correlation Notation - Answer: r
Statistical Reference - Answer: the process of using data from a sample to gain information about the
population.
Population (Ex.) - Answer: all faculty members at the university.
Sample (Ex.) - Answer: the 10 faculty members selected.
Subject (Ex.) - Answer: an individual faculty member.
Parameter (Ex.) - Answer: average age of all faculty members at her university.
Statistic (Ex.) - Answer: average age of the 10 selected.
Sampling Bias - Answer: occurs when the method of selecting a sample causes the sample to differ from
the population in some relevant way.
Random Sampling - Answer: is the best way of obtaining a sample that is representative of the
population.
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