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Key Concepts:
Terms in this set (23)
The complete collection of all items of interest is call the
population
A subset of items of intererst that are measured and examined is called a
sample
A characteristic or property of an individual item of interest, which may change from individual to individual is called a
variable
Data that can only take on finitely many or countably infinitely many values is said to be
discrete data
Data that can take on infinitely many values such as all of values within an interval of the real numbers is said to be
continuous data
A sample of data that is chosen so that each subset of data (of the appropriate size) is equally likely to be included in the sample is said to be a
simple random sample
A sample of data that is chosen so that each individual data value is equally likely to be included in the sample is said to be a
random sample
A number calculated to describe some characteristic of a population is called a population
parmeter
A number calculated to describe some characteristic of a sample is called a sample
statistic
The highest score of Dr. Jackson's students on the final exam taken by all college algebra students is a
statistic
The average height of all UA Fort Smith students is a
parameter
Computing numerical and graphical statistics for a set of data is known as:
descriptive
Starting with a known sample and making preditions and decisions about an entire population is known as:
inferential
If we start with a population with know properties and we assign a likelyhood to a event (sample) then we are computing
probabilities
List the four levels of data in increasing order of information included
nominal
ordinal
interval
ratio
Identify which of these methods can be used to distort a bar graph.
stretch vertical scale
starting at point other than origin
making width of bars proportional to height
A Pareto Chart _____
all of above
Explain the difference between the bars on a Pareto Chart and the bars on a Bar Graph.
pareto draw in decreasing order of height
Which measure of center (mean or median) is resistant? Explain what it means for that measure to be resistant.
median not sensitive to extreme values
higher standard deviation
more scores on the low end and more scores on the high end
1. A ________ should only be used with nominal data to emphasize parts of a whole (relative frequencies), and only then when the number of categories is small and the difference between their relative frequencies is significant.
pie
2. Which of the following graphs is useful with at least ordinal data and gives a visual indication of shaped, center, speread, and outliers while including all data values?
dot plot
3. Which of the following is used with quantitative data to summarize measures of relative standing and gives a visual indication of center, spread, shape, and outliers?
box
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