Chapter 4: Summary Statistics
Mean - correct answer-The arithmetic average of a data set. Most common measure of
central location.
To calculate the mean - correct answer-Add up all the values in the data set and then divide
by the number of observations.
Notation - correct answer-series or system of written symbols used to represent numbers,
amounts, or elements in something such as music or mathematics.
Numerical summaries of shape are - correct answer-not covered because they are seldom
used in practice.
Gravitational center - correct answer-Mean X is the gravitational center of the distribution.
Where the data would balance if placed on a seesaw.
Susceptibility - correct answer-Small weight far from the center will counterbalace a large
weight near the center.
Three functions of the mean (A) - correct answer-It can be used to predict an individual value
drawn at random from the sample.
Three functions of the mean (B) - correct answer-It can be used to predict a value drawn at
random from the population.
Three functions of the mean (C) - correct answer-It can be used to predict the population
mean.
The mean from a frequency table - correct answer-Mean can be derived from a frequency
table by calculating the weighted average of values with weights provided by the relative
frequency (proportions) of each value using the formula.
Sole reliance on a mean - correct answer-often misses the true picture.
Median - correct answer-The midpoint of a distribution- the point that is greater than or equal
to half of the values in the data set.
Depth - correct answer-The smallest statistical rank (either up or down) of a set of data.
Resistant - correct answer-Observed variables often contain rogue outlier values that lie far
away from the sample mean.
The median is relativity resistant to - correct answer-outliers and skews
Mode - correct answer-The most frequently occurring value in the data set.
Mean - correct answer-The arithmetic average of a data set. Most common measure of
central location.
To calculate the mean - correct answer-Add up all the values in the data set and then divide
by the number of observations.
Notation - correct answer-series or system of written symbols used to represent numbers,
amounts, or elements in something such as music or mathematics.
Numerical summaries of shape are - correct answer-not covered because they are seldom
used in practice.
Gravitational center - correct answer-Mean X is the gravitational center of the distribution.
Where the data would balance if placed on a seesaw.
Susceptibility - correct answer-Small weight far from the center will counterbalace a large
weight near the center.
Three functions of the mean (A) - correct answer-It can be used to predict an individual value
drawn at random from the sample.
Three functions of the mean (B) - correct answer-It can be used to predict a value drawn at
random from the population.
Three functions of the mean (C) - correct answer-It can be used to predict the population
mean.
The mean from a frequency table - correct answer-Mean can be derived from a frequency
table by calculating the weighted average of values with weights provided by the relative
frequency (proportions) of each value using the formula.
Sole reliance on a mean - correct answer-often misses the true picture.
Median - correct answer-The midpoint of a distribution- the point that is greater than or equal
to half of the values in the data set.
Depth - correct answer-The smallest statistical rank (either up or down) of a set of data.
Resistant - correct answer-Observed variables often contain rogue outlier values that lie far
away from the sample mean.
The median is relativity resistant to - correct answer-outliers and skews
Mode - correct answer-The most frequently occurring value in the data set.
