Engineering Data Analysis Pre-lim
Exam Questions and Answers
Statistics - ANS-The science of collecting, organizing, presenting, analyzing, and
interpreting numerical data to assist in making more effective decisions.
Population - ANS-It is a collection of all possible individuals, objects, or measurements
of interest
Sample - ANS-It is a portion or part of the population of interest
Multivariate data - ANS-The result when more than two variables are measured
Bar Graph
Pareto Chart - ANS-2 popular ways of presenting QUALITATIVE DATA
Pareto Analysis - ANS-It is a simple technique for prioritizing possible changes by
identifying the problems that will be resolved by making these changes
Histogram
Dotplots
Boxplots - ANS-Popular tools for summarizing QUANTITATIVE DATA
Scatterplots - ANS-Bivariate quantitative data are summarized using
Scatterplots - ANS-Multivariate quantitative data are summarized using
Time-series plots - ANS-Data collected over time are generally summarized using
Mean
Median
Mode - ANS-3 Measures of central tendency
Median - ANS-This is used if the data is highly skewed when measuring the center
Unimodal - ANS-one mode
Bimodal - ANS-two modes
Mode, Median, Mean - ANS-Arrangement from left to right if positively skewed or right-
skewed
, Mean, Median, Mode - ANS-Arrangement from left to right if negatively skewed or left-
skewed
Range IQR
Variance
Standard Deviation - ANS-Measures of Variability
interquartile range - ANS-It measures the spread of the middle 50% of an ordered data
set
Variance - ANS-A way to measure how far a set of numbers is spread out
75% - ANS-According to Chebyshev's Theorem, ____% of the data are within mean-
2*std and mean+2*std
88.89% - ANS-According to Chebyshev's Theorem, ____% of the data are within mean-
3*std and mean+3*std
Z-score
Percentile/Quartile - ANS-Measures of Relative Standing
Class Interval - ANS-These are numbers defining the class consisting of the end
numbers
Class limits - ANS-The end numbers of a class
Class frequency - ANS-It shows the number of observation failing in the class
Class Boundaries - ANS-These are so-called "True class limits"
LCB - ANS-The middle value of the lower class limit of the class and the upper class
limit of the preceding class
UCB - ANS-the middle value between the upper class limit and the lower limit of the
next class
Class size - ANS-The difference between two consecutive upper limits or two
consecutive lower limits
Class marks - ANS-The midpoint or the middle value of a class interval
Probability Distribution - ANS-A mathematical function that provides the probabilities of
occurrence of different possible outcomes in an experiment
Variables - ANS-Symbols that can take on any of a specified set of values
Exam Questions and Answers
Statistics - ANS-The science of collecting, organizing, presenting, analyzing, and
interpreting numerical data to assist in making more effective decisions.
Population - ANS-It is a collection of all possible individuals, objects, or measurements
of interest
Sample - ANS-It is a portion or part of the population of interest
Multivariate data - ANS-The result when more than two variables are measured
Bar Graph
Pareto Chart - ANS-2 popular ways of presenting QUALITATIVE DATA
Pareto Analysis - ANS-It is a simple technique for prioritizing possible changes by
identifying the problems that will be resolved by making these changes
Histogram
Dotplots
Boxplots - ANS-Popular tools for summarizing QUANTITATIVE DATA
Scatterplots - ANS-Bivariate quantitative data are summarized using
Scatterplots - ANS-Multivariate quantitative data are summarized using
Time-series plots - ANS-Data collected over time are generally summarized using
Mean
Median
Mode - ANS-3 Measures of central tendency
Median - ANS-This is used if the data is highly skewed when measuring the center
Unimodal - ANS-one mode
Bimodal - ANS-two modes
Mode, Median, Mean - ANS-Arrangement from left to right if positively skewed or right-
skewed
, Mean, Median, Mode - ANS-Arrangement from left to right if negatively skewed or left-
skewed
Range IQR
Variance
Standard Deviation - ANS-Measures of Variability
interquartile range - ANS-It measures the spread of the middle 50% of an ordered data
set
Variance - ANS-A way to measure how far a set of numbers is spread out
75% - ANS-According to Chebyshev's Theorem, ____% of the data are within mean-
2*std and mean+2*std
88.89% - ANS-According to Chebyshev's Theorem, ____% of the data are within mean-
3*std and mean+3*std
Z-score
Percentile/Quartile - ANS-Measures of Relative Standing
Class Interval - ANS-These are numbers defining the class consisting of the end
numbers
Class limits - ANS-The end numbers of a class
Class frequency - ANS-It shows the number of observation failing in the class
Class Boundaries - ANS-These are so-called "True class limits"
LCB - ANS-The middle value of the lower class limit of the class and the upper class
limit of the preceding class
UCB - ANS-the middle value between the upper class limit and the lower limit of the
next class
Class size - ANS-The difference between two consecutive upper limits or two
consecutive lower limits
Class marks - ANS-The midpoint or the middle value of a class interval
Probability Distribution - ANS-A mathematical function that provides the probabilities of
occurrence of different possible outcomes in an experiment
Variables - ANS-Symbols that can take on any of a specified set of values
