Week One Math 221– Expert Strategies| Accurate
Verified Questions & Answers| Guaranteed Success|
2025-2026
Mode
solution
the most frequent number appearing in a data set
Mean
solution
average
empirical rule
solution
the percentage of data that falls within 1, 2 or 3 standard
deviations of the mean in a symmetrical bell shaped distribution
standard deviation
solution
the square root of the variance
Standard score
solution
show how the particular data point is from the mean in the terms of
the number of standard deviations
Histogram
solution
vertical bar chart that shows frequency on a y-axis
cluster sample
solution
a sample where the population is divided into groups and several
groups are randomly selected from all from those selected
groups are sampled
Population
solution
collection of all counts that are interested
sample
1
, solution
a subset, or part, of a population
stratified sample
solution
a sample where the population is divided into groups and several
are randomly sampled form each group
qualitative data
solution
consists of attributes, labels, or nonnumerical entries
frequency histogram
solution
a graph shows vertical bars with the number points on the y-axis
and groups on the x-axis
In manufacturing, systematic sampling could be used to determine
if the machines are operating correctly. Which of the following best
describes this type of sampling?
solution
Every 10th product in the line is selected
Which of the following data sets would you expect to have the
smallest mean?
solution
The number of phones a person owns
In a normally distributed data set with a mean of 24 and a standard
deviation of 4.2, what percentage of the data would be between
19.8 and 28.2 and why?
solution
68% based on the Empirical Rule
If data set A has a smaller standard deviation than data set B,
what would be different about their distributions?
solution
Data set A would have more data near the center of the
distribution
If a data set is right skewed, where would the mean be in relation
to the mode?
solution
2
Verified Questions & Answers| Guaranteed Success|
2025-2026
Mode
solution
the most frequent number appearing in a data set
Mean
solution
average
empirical rule
solution
the percentage of data that falls within 1, 2 or 3 standard
deviations of the mean in a symmetrical bell shaped distribution
standard deviation
solution
the square root of the variance
Standard score
solution
show how the particular data point is from the mean in the terms of
the number of standard deviations
Histogram
solution
vertical bar chart that shows frequency on a y-axis
cluster sample
solution
a sample where the population is divided into groups and several
groups are randomly selected from all from those selected
groups are sampled
Population
solution
collection of all counts that are interested
sample
1
, solution
a subset, or part, of a population
stratified sample
solution
a sample where the population is divided into groups and several
are randomly sampled form each group
qualitative data
solution
consists of attributes, labels, or nonnumerical entries
frequency histogram
solution
a graph shows vertical bars with the number points on the y-axis
and groups on the x-axis
In manufacturing, systematic sampling could be used to determine
if the machines are operating correctly. Which of the following best
describes this type of sampling?
solution
Every 10th product in the line is selected
Which of the following data sets would you expect to have the
smallest mean?
solution
The number of phones a person owns
In a normally distributed data set with a mean of 24 and a standard
deviation of 4.2, what percentage of the data would be between
19.8 and 28.2 and why?
solution
68% based on the Empirical Rule
If data set A has a smaller standard deviation than data set B,
what would be different about their distributions?
solution
Data set A would have more data near the center of the
distribution
If a data set is right skewed, where would the mean be in relation
to the mode?
solution
2
