DAT 565 Week 1 Ch 3 Exam Questions with Correct Answers Latest Update 2025-2026
Before calculating summary statistics or graphing a data set, it is a good idea to... - Answers
Visualize how data was collected
Determine if the data is time-series or cross-sectional
Sort the data if possible
Which type of data cannot be sorted? - Answers Nominal data does not have a ranking.
Therefore, sorting the data, or ordering the data, is not possible
A stem-and-leaf plot is basically... - Answers a frequency tally, a tool used in exploratory data
analysis, a tool which uses the digits in each number to create stems and leaves
Dot plots can show which features of a data set? - Answers Shape, variability, and center
One of the primary goals of constructing a frequency distribution for quantitative data is to
summarize the data... - Answers by showing frequency of values that lie within a class or bin
If the data were collected from a random sample, we must allow for (blank) error. - Answers
sampling
Sorting data is helpful because... - Answers we can see the range of values.
we can see the frequency of each data value.
Stem-and-leaf displays can be used to... - Answers determine central tendency and dispersion.
analyze the small samples of integer data.
observe individual data points.
Assume the professor gave an exam to a class of 50 students. The high score was 98 points
and the low score was 53 points. The professor wants to create a frequency distribution that is
divided into five bins for the exam scores. The approximate bin width for the data is (blank)
points but you might round up the bin width to (blank) for an easier interpretation. - Answers
9/10
True or False- A dot plot displays individual values of qualitative data. - Answers false
When a researcher wants to know the proportion of all observations that fall within a particular
Before calculating summary statistics or graphing a data set, it is a good idea to... - Answers
Visualize how data was collected
Determine if the data is time-series or cross-sectional
Sort the data if possible
Which type of data cannot be sorted? - Answers Nominal data does not have a ranking.
Therefore, sorting the data, or ordering the data, is not possible
A stem-and-leaf plot is basically... - Answers a frequency tally, a tool used in exploratory data
analysis, a tool which uses the digits in each number to create stems and leaves
Dot plots can show which features of a data set? - Answers Shape, variability, and center
One of the primary goals of constructing a frequency distribution for quantitative data is to
summarize the data... - Answers by showing frequency of values that lie within a class or bin
If the data were collected from a random sample, we must allow for (blank) error. - Answers
sampling
Sorting data is helpful because... - Answers we can see the range of values.
we can see the frequency of each data value.
Stem-and-leaf displays can be used to... - Answers determine central tendency and dispersion.
analyze the small samples of integer data.
observe individual data points.
Assume the professor gave an exam to a class of 50 students. The high score was 98 points
and the low score was 53 points. The professor wants to create a frequency distribution that is
divided into five bins for the exam scores. The approximate bin width for the data is (blank)
points but you might round up the bin width to (blank) for an easier interpretation. - Answers
9/10
True or False- A dot plot displays individual values of qualitative data. - Answers false
When a researcher wants to know the proportion of all observations that fall within a particular
