ACTUAL Exam Questions and CORRECT
Answers
A variable which records the most common form of soil found at a sample site would be an
example of which level of measurement? - CORRECT ANSWER - Nominal
A variable which lists the percentage of people within a city that own a car would be an example
of which level of measurement? - CORRECT ANSWER - Ratio
Measurement of temperature in Fahrenheit is an example of which level of measurement? -
CORRECT ANSWER - Interval
In order to be used for inferential statistics, a sample must be representative of the population
under investigation. - CORRECT ANSWER - True
What is the nature of the distribution of the data featured in the histogram below? - CORRECT
ANSWER - Positive Skew
All of the following are positive aspects of histograms except: - CORRECT ANSWER -
They maintain the precision of individual scores
_____________________________________ is defined as the entire group of objects or entities
under study. - CORRECT ANSWER - Population
Inferential statistics can only offer insight about the members of a sample. - CORRECT
ANSWER - False
In a data matrix, ___________________________ represent the values of individual respondents
to a single specific question. - CORRECT ANSWER - Score
, In the data matrix, a column represents: - CORRECT ANSWER - Measurements of a
single variable
The median is easily affected by outliers - CORRECT ANSWER - False
Variance and Standard Deviation are closely associated with which measure of central tendancy
- CORRECT ANSWER - Mean
I am working with a dataset that exhibits a severe positive skew. Which measure of central
tendency should I use? - CORRECT ANSWER - Median
Now I am working with a dataset that had a bimodal distribution. Which measure of central
tendency should I use? - CORRECT ANSWER - Mode
Range can tell us a lot about how data are concentrated within a distribution - CORRECT
ANSWER - False
Interquartile Range is calculated based upon: - CORRECT ANSWER - the difference
between the 25th percentile and the 75th percentile
A high value of variance indicates that data are - CORRECT ANSWER - not concentrated
close to the mean
Tukey's procedure relies on which measure of dispersion to eliminate outliers? - CORRECT
ANSWER - Interquartile Range
It is logical to describe a single observations location in the overall distribution in terms of from
the mean. - CORRECT ANSWER - Standard deviations