Section 1.1
The collection of all outcomes, responses, measurements, or counts that are of interest.
What is population?
Data that consist of attributes, labels, or nonnumerical entries.
What is Qualitative Data?
A table that shows classes or intervals of data entries with a count of the number of entries in each class.
What is frequency distribution?
Mean of a data set whose entries have varying weights.
What is the weighted mean?
The difference between the maximum and minimum data entries in the set.
What is range?
a subset, or part, of a population.
What is a sample?
Data that consist of numbers that are measurements or counts.
What is Quantitative data?
The sum of the lower and upper limits of the class divided by two.
What is the midpoint?
The sum of the data entries divided by the number of entries.
What is the mean?
The difference between the entry and the mean of the data set.
What is deviation?
a numerical description of a population characteristic.
What is a parameter?
Data that is categorized using names, labels, or qualities. No mathematical computations can be made at this level.
What is the nominal level of measurement?
The portion, or percentage, of the data that falls in that class.
The data entry that occurs with the greatest frequency.
What is mode?
Describes the standard deviation as a percent of the mean in a data set.
What is the Coefficient of variation?
a numerical description of a sample characteristic.
What is a statistic?
Data that can be arranged in order, or ranked, but differences between data entries are not meaningful.
What is the ordinal level of measurement?
A chart that uses bars to represent the frequency distribution of a data set.
What is a frequency histogram?
A data entry that is far removed from the other entries in the data set.
What is an outlier?
Rule that can help you see how valuable the standard deviation can be as a measure of variation.
the branch of statistics that involves using a sample to draw conclusions about a population.
What is Inferential statistics?
Data that can be ordered, and meaningful differences between data entries can be calculated. At the interval level, a zero entry simply represents a position on a scale; the entry is not an inherent zero.
What is the interval level of measurement?
A line graph that displays the cumulative frequency of each class at its upper class boundary. The upper boundaries are marked on the horizontal axis, and the cumulative frequencies are marked on the vertical axis.
What is a cumulative frequency graph/ogive?
A value that represents a typical, or central, entry of a data set. Most commonly used measures are the mean, median, and mode.
What is a measure of central tendency?
Measures the variation of the data set about the mean and has the same units of measure as the data set.
What is standard Deviation?