BUAL 2600 COMPREHENSIVE QUESTIONS AND
ANSWERS SURE A+
✔✔standard - ✔✔a normal distribution with mean equal to 0 and a standard deviation
equal to 1 is called the ________ normal distribution
✔✔continuous - ✔✔the thickness of a randomly selected piece of metal is a ________
random variable
✔✔larger - ✔✔________ values of the standard deviation result in a normal curve that
is wider and flatter
✔✔also normal - ✔✔if the population of individual items is normal, then the population
of all sample means is...
✔✔population mean - ✔✔mean of all possible samples equals...
✔✔directly proportional to the variance of the population and inversely proportional to
the sample size - ✔✔the variance of the sampling distribution is...
✔✔predictive analysis - ✔✔what type of analysis would we use to find out what COULD
happened?
✔✔descriptive analysis - ✔✔what type of analysis would we use to find out what HAS
happened?
✔✔prescriptive analysis - ✔✔what type of analysis would we use to find out what we
SHOULD do?
✔✔identify and define a business problem - ✔✔the first part of the analytics process
and arguably the most important part is to...
, ✔✔probability sampling - ✔✔what type of sampling is where we know the chance that
each element will be included in the sample, which allows us to make statistical
inferences about the sample population?
✔✔big data - ✔✔transactional data are now used by businesses as a part of...
✔✔open-ended, multiple-choice, and dichotomous - ✔✔3 types of questions used in
survey research
✔✔dichotomous - ✔✔what type of question is a "yes or no" question?
✔✔sampling error - ✔✔the difference between a numerical descriptor of the population
and the corresponding descriptor of the sample
✔✔primary data - ✔✔data that is collected by an individual through personally planned
experimentation and observation
✔✔milage of a car - ✔✔what is an example of quantitative date?
✔✔process - ✔✔sequence of operations that takes inputs and turns them into outputs
✔✔probability sample - ✔✔one method of being sure a sample being studied can be
used to make statistical inferences about the population is to select a...
✔✔histogram - ✔✔what type of graph divides quantitative measurements into classes
and graphs the frequency, relative frequency, or percentage frequency for each class?
✔✔bar chart, histogram - ✔✔a ________ displays the frequency of each class with
qualitative data and a ________ displays the frequency of each class with quantitative
data
✔✔scatter plot - ✔✔what type of graph shows the relationship between 2 variables?
✔✔pareto chart - ✔✔what type of graph can be used to differentiate the "vital few"
causes of quality problems and the "trivial many" causes of quality problems?
✔✔stem-and-leaf plots, histograms, and bar graphs - ✔✔what graphical tools are used
to study the shapes of distributions?
✔✔3 - ✔✔a normal population has 99.73% of the population measurements within how
many standard deviations of the mean?
✔✔mean, median, and mode - ✔✔what are 3 measures of central tendency?
ANSWERS SURE A+
✔✔standard - ✔✔a normal distribution with mean equal to 0 and a standard deviation
equal to 1 is called the ________ normal distribution
✔✔continuous - ✔✔the thickness of a randomly selected piece of metal is a ________
random variable
✔✔larger - ✔✔________ values of the standard deviation result in a normal curve that
is wider and flatter
✔✔also normal - ✔✔if the population of individual items is normal, then the population
of all sample means is...
✔✔population mean - ✔✔mean of all possible samples equals...
✔✔directly proportional to the variance of the population and inversely proportional to
the sample size - ✔✔the variance of the sampling distribution is...
✔✔predictive analysis - ✔✔what type of analysis would we use to find out what COULD
happened?
✔✔descriptive analysis - ✔✔what type of analysis would we use to find out what HAS
happened?
✔✔prescriptive analysis - ✔✔what type of analysis would we use to find out what we
SHOULD do?
✔✔identify and define a business problem - ✔✔the first part of the analytics process
and arguably the most important part is to...
, ✔✔probability sampling - ✔✔what type of sampling is where we know the chance that
each element will be included in the sample, which allows us to make statistical
inferences about the sample population?
✔✔big data - ✔✔transactional data are now used by businesses as a part of...
✔✔open-ended, multiple-choice, and dichotomous - ✔✔3 types of questions used in
survey research
✔✔dichotomous - ✔✔what type of question is a "yes or no" question?
✔✔sampling error - ✔✔the difference between a numerical descriptor of the population
and the corresponding descriptor of the sample
✔✔primary data - ✔✔data that is collected by an individual through personally planned
experimentation and observation
✔✔milage of a car - ✔✔what is an example of quantitative date?
✔✔process - ✔✔sequence of operations that takes inputs and turns them into outputs
✔✔probability sample - ✔✔one method of being sure a sample being studied can be
used to make statistical inferences about the population is to select a...
✔✔histogram - ✔✔what type of graph divides quantitative measurements into classes
and graphs the frequency, relative frequency, or percentage frequency for each class?
✔✔bar chart, histogram - ✔✔a ________ displays the frequency of each class with
qualitative data and a ________ displays the frequency of each class with quantitative
data
✔✔scatter plot - ✔✔what type of graph shows the relationship between 2 variables?
✔✔pareto chart - ✔✔what type of graph can be used to differentiate the "vital few"
causes of quality problems and the "trivial many" causes of quality problems?
✔✔stem-and-leaf plots, histograms, and bar graphs - ✔✔what graphical tools are used
to study the shapes of distributions?
✔✔3 - ✔✔a normal population has 99.73% of the population measurements within how
many standard deviations of the mean?
✔✔mean, median, and mode - ✔✔what are 3 measures of central tendency?
