STATISTICS PORTAGE LEARNING ESSENTIAL
STUDY QUESTIONS AND ANSWERS
◉ Qualitative.
Answer: cant be measured, only classified as category (age, gender,
etc.)
◉ Quantitative.
Answer: Measure recorded on numerical scale (How many, How
much; children, salary, bank balance)
◉ Cross-sectional data.
Answer: information collected @ same or approx. same point in time
(Avg. GPA of grad Seniors from one college)
◉ Time series data.
Answer: collected over several time periods (PPG for conventional
Gas) [Fluctuations of data]
◉ Descriptive stats.
Answer: A compiled summary of the data analysis
numerical/ graphical methods to explore data [pi-chart, histogram]
, --> Most commonly used numerical stat is called avg. or mean
◉ Statistical Inference.
Answer: Data collected from small portion of the larger group
(sample data) to make estimates on larger sets of data
--> Large group of elements= population
--> Smaller group= group
◉ Nominal level of measure.
Answer: Data categorized using names, labels, or qualities [zip
codes, social security #'s, or #'s on sports Jerseys
◉ Ordinal level of measure.
Answer: Qualitative or Quantitative, can be arranged in order, or
ranked, differences between data entries aren't meaningful
◉ Interval level of measurements.
Answer: can be ordered, and meaningful differences between data
entries can be calculated [0 entry represents a position on the scale]
◉ Ratio level of measurement.
Answer: similar to data at interval level w/ added property that a 0
entry is an inherent 0 (None)
STUDY QUESTIONS AND ANSWERS
◉ Qualitative.
Answer: cant be measured, only classified as category (age, gender,
etc.)
◉ Quantitative.
Answer: Measure recorded on numerical scale (How many, How
much; children, salary, bank balance)
◉ Cross-sectional data.
Answer: information collected @ same or approx. same point in time
(Avg. GPA of grad Seniors from one college)
◉ Time series data.
Answer: collected over several time periods (PPG for conventional
Gas) [Fluctuations of data]
◉ Descriptive stats.
Answer: A compiled summary of the data analysis
numerical/ graphical methods to explore data [pi-chart, histogram]
, --> Most commonly used numerical stat is called avg. or mean
◉ Statistical Inference.
Answer: Data collected from small portion of the larger group
(sample data) to make estimates on larger sets of data
--> Large group of elements= population
--> Smaller group= group
◉ Nominal level of measure.
Answer: Data categorized using names, labels, or qualities [zip
codes, social security #'s, or #'s on sports Jerseys
◉ Ordinal level of measure.
Answer: Qualitative or Quantitative, can be arranged in order, or
ranked, differences between data entries aren't meaningful
◉ Interval level of measurements.
Answer: can be ordered, and meaningful differences between data
entries can be calculated [0 entry represents a position on the scale]
◉ Ratio level of measurement.
Answer: similar to data at interval level w/ added property that a 0
entry is an inherent 0 (None)
