EXST 2201 3.1 QUESTIONS AND
ANSWERS GRADED A+
What is the purpose of descriptive statistics?
Descriptive statistics summarize and organize data to provide a clear overview of its main
features, making it easier to understand.
How do measures of central tendency differ from measures of vari...
✔✔Descriptive statistics summarize and organize data to provide a clear overview of its main
features, making it easier to understand.
How do measures of central tendency differ from measures of variability?
✔✔Measures of central tendency indicate where data tends to cluster, while measures of
variability show how spread out the data points are.
What are the three main measures of central tendency?
✔✔The three main measures of central tendency are the mean, median, and mode, each
providing different insights into the data set.
How is the mean calculated?
✔✔The mean is calculated by adding all the values in a data set and then dividing by the number
of values.
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, What is the median, and how is it determined?
✔✔The median is the middle value of a data set when it is ordered from least to greatest; if there
is an even number of values, it is the average of the two middle numbers.
What does the mode represent in a data set?
✔✔The mode is the value that appears most frequently in a data set, indicating the most common
observation.
How can outliers affect the mean?
✔✔Outliers can significantly skew the mean, making it unrepresentative of the overall data set
since they can pull the average in their direction.
What are the different measures of variability?
✔✔The different measures of variability include range, variance, and standard deviation, which
provide insights into the spread of data points.
How is the range calculated?
✔✔The range is calculated by subtracting the smallest value in a data set from the largest value,
providing a measure of total spread.
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