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Stats 270 Final Exam Questions and
Answers
Inferential statistics are usually based on data obtained from____ to make generalizations -
ANSWER✔✔-Samples
Which of the following is a discrete variable - ANSWER✔✔-Number of children
Which of the following is a continuous variable - ANSWER✔✔-Time spent watching TV
A nominal-level variable like marital status or gender is always - ANSWER✔✔-Discrete
Categories of nominal level variables should be - ANSWER✔✔-Exhaustive, mutually exclusive to avoid
ambiguity, and relevant to research goals
Variables measured at the ordinal level are limited to which of the following mathematical operations -
ANSWER✔✔-Ranking cases as higher, lower, more or less
To be converted to % the proportion must be multiplied by - ANSWER✔✔-100
Frequency distributions may be compiled for variables measured at which level? - ANSWER✔✔-Ordinal
Pie charts show the frequency distr. of - ANSWER✔✔-One variable
Which of the following can be represented in a bar chart - ANSWER✔✔-Counts
The 3 commonly used measures of central tendency - ANSWER✔✔-Define "typical" or "average" in
different ways and will usually have different values.
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The most appropriate measure of central tendency for gender would be the - ANSWER✔✔-Mode
The median defines "central tendency" in terms of the - ANSWER✔✔-Central case
For ordinal level variables, the most appropriate measure of central tendency is generally - ANSWER✔✔-
Median
For variables measured at the interval-ratio level, the preferred measure of central tendency would be
the - ANSWER✔✔-Quartile
In any distribution, the mean and the median will have the same value when the distribution is -
ANSWER✔✔-Symmetrical
In a positively skewed distribution, the mean is - ANSWER✔✔-Less in value than the median
Measures of dispersion provide information about the - ANSWER✔✔-Variety within the distribution of
scores
One problem with the range as the measure of dispersion is that it - ANSWER✔✔-Is based on only the
most extreme scores
The second quartile is equal to the - ANSWER✔✔-Median
The distances between the scores and the mean are called - ANSWER✔✔-Deviations
Since computation of the standard deviation requires addition, division, and other mathematical
operations, it should be used for - ANSWER✔✔-Interval- ratio variables only
The distribution of scores become more variable, the value of the standard deviation - ANSWER✔✔-
Increases
Copyright ©Stuvia International BV 2010-2024 Page 2/8
Stats 270 Final Exam Questions and
Answers
Inferential statistics are usually based on data obtained from____ to make generalizations -
ANSWER✔✔-Samples
Which of the following is a discrete variable - ANSWER✔✔-Number of children
Which of the following is a continuous variable - ANSWER✔✔-Time spent watching TV
A nominal-level variable like marital status or gender is always - ANSWER✔✔-Discrete
Categories of nominal level variables should be - ANSWER✔✔-Exhaustive, mutually exclusive to avoid
ambiguity, and relevant to research goals
Variables measured at the ordinal level are limited to which of the following mathematical operations -
ANSWER✔✔-Ranking cases as higher, lower, more or less
To be converted to % the proportion must be multiplied by - ANSWER✔✔-100
Frequency distributions may be compiled for variables measured at which level? - ANSWER✔✔-Ordinal
Pie charts show the frequency distr. of - ANSWER✔✔-One variable
Which of the following can be represented in a bar chart - ANSWER✔✔-Counts
The 3 commonly used measures of central tendency - ANSWER✔✔-Define "typical" or "average" in
different ways and will usually have different values.
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, Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024
The most appropriate measure of central tendency for gender would be the - ANSWER✔✔-Mode
The median defines "central tendency" in terms of the - ANSWER✔✔-Central case
For ordinal level variables, the most appropriate measure of central tendency is generally - ANSWER✔✔-
Median
For variables measured at the interval-ratio level, the preferred measure of central tendency would be
the - ANSWER✔✔-Quartile
In any distribution, the mean and the median will have the same value when the distribution is -
ANSWER✔✔-Symmetrical
In a positively skewed distribution, the mean is - ANSWER✔✔-Less in value than the median
Measures of dispersion provide information about the - ANSWER✔✔-Variety within the distribution of
scores
One problem with the range as the measure of dispersion is that it - ANSWER✔✔-Is based on only the
most extreme scores
The second quartile is equal to the - ANSWER✔✔-Median
The distances between the scores and the mean are called - ANSWER✔✔-Deviations
Since computation of the standard deviation requires addition, division, and other mathematical
operations, it should be used for - ANSWER✔✔-Interval- ratio variables only
The distribution of scores become more variable, the value of the standard deviation - ANSWER✔✔-
Increases
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