c955 wgu
c955 wgu
Study online at https://quizlet.com/_9k9iwa
1. quantitative data Quantitative data consists of data values that
are numbers, representing quantities that can
be counted or measured.
2. The Empirical Rule According to The Empirical Rule, approxi-
mately 68% of the data points in a dataset will
be within 1 standard deviation of the mean.
95% of all values are within 2 standard devia-
tions of the mean.
3. Normal distribution In a normal distribution data is symmetrical,
so the mean, median, and mode are all equal.
4. measure of spread Measures of spread describe how similar or
varied the set of observed values are for a
particular variable (data item). Measures of
spread include the range, quartiles and the
interquartile range, variance and standard
deviation.
5. Standard Deviation Rule 2 and 3 devia- According the the Standard Deviation Rule,
tions approximately 2.35 percent of all values will
fall between 2 and 3 standard deviations
above the mean.
6. How are the mode and mean of a sam- The mode is less than the mean.
ple related if the distribution is positively
skewed?
7. A set of data is normally distributed with We know that the standard deviation is 20.
a mean of 85 and standard deviation 20. To obtain the values that are one standard
The data point values that fall within one deviation above and below the mean, we do
the following: To obtain the first value, we will
, c955 wgu
c955 wgu
Study online at https://quizlet.com/_9k9iwa
standard deviation range from ___________ subtract 20 from the mean: 85 −20 =65 To
to ___________? obtain the second value, we will add 20 to the
mean: 85 +20 =105 Therefore, the data values
that will fall within 1 standard deviation of the
mean will range from 65 to 105.
8. best used to display categorical data
9. How are the mean, median, and mode of The values are all equal
a sample related if the distribution is nor-
mally distributed?
10. IQR (interquartile range) Q3-Q1
11. standard deviation Using the Standard Deviation Rule, we know
that when data is normally distributed, 50%
of the values fall above the mean, and 50% of
the values fall below the mean.
12. population sample from a box plot. It is not possible to estimate the size of the
population sample from a box plot.
13. Pie chart A pie chart is the best type of graph to use to
show categorical data, where each category
represents a share of the total as a percent.
14. Scatterplot A scatterplot is a graphical display that shows
the explanatory variable on the x-axis and
the response variable on the y-axis. Is useful
when both variables in the data set are quan-
titative.
15. Cluster
c955 wgu
Study online at https://quizlet.com/_9k9iwa
1. quantitative data Quantitative data consists of data values that
are numbers, representing quantities that can
be counted or measured.
2. The Empirical Rule According to The Empirical Rule, approxi-
mately 68% of the data points in a dataset will
be within 1 standard deviation of the mean.
95% of all values are within 2 standard devia-
tions of the mean.
3. Normal distribution In a normal distribution data is symmetrical,
so the mean, median, and mode are all equal.
4. measure of spread Measures of spread describe how similar or
varied the set of observed values are for a
particular variable (data item). Measures of
spread include the range, quartiles and the
interquartile range, variance and standard
deviation.
5. Standard Deviation Rule 2 and 3 devia- According the the Standard Deviation Rule,
tions approximately 2.35 percent of all values will
fall between 2 and 3 standard deviations
above the mean.
6. How are the mode and mean of a sam- The mode is less than the mean.
ple related if the distribution is positively
skewed?
7. A set of data is normally distributed with We know that the standard deviation is 20.
a mean of 85 and standard deviation 20. To obtain the values that are one standard
The data point values that fall within one deviation above and below the mean, we do
the following: To obtain the first value, we will
, c955 wgu
c955 wgu
Study online at https://quizlet.com/_9k9iwa
standard deviation range from ___________ subtract 20 from the mean: 85 −20 =65 To
to ___________? obtain the second value, we will add 20 to the
mean: 85 +20 =105 Therefore, the data values
that will fall within 1 standard deviation of the
mean will range from 65 to 105.
8. best used to display categorical data
9. How are the mean, median, and mode of The values are all equal
a sample related if the distribution is nor-
mally distributed?
10. IQR (interquartile range) Q3-Q1
11. standard deviation Using the Standard Deviation Rule, we know
that when data is normally distributed, 50%
of the values fall above the mean, and 50% of
the values fall below the mean.
12. population sample from a box plot. It is not possible to estimate the size of the
population sample from a box plot.
13. Pie chart A pie chart is the best type of graph to use to
show categorical data, where each category
represents a share of the total as a percent.
14. Scatterplot A scatterplot is a graphical display that shows
the explanatory variable on the x-axis and
the response variable on the y-axis. Is useful
when both variables in the data set are quan-
titative.
15. Cluster
