Elementary Stats, Ch3: Data Description (Vocab)

What does "Bimodal" refer to in a data set or distribution?

• A data set with one distinct peak or mode.

• A data set with two distinct peaks or modes.

• A data set with multiple peaks or modes.

• A data set with no distinct peaks or modes.

What is a "Boxplot" used to graphically represent?

• The mean and standard deviation of a data set.

• The range and mode of a data set.

• The five-number summary of a data set.

• The variance and coefficient of variation of a data set.

Chebyshev's Theorem states that for any set of data, the proportion of observations within k standard deviations of the mean is at least:

• 1 - 1/k

• 1 - 1/k^2

• k - 1/k^2

• k/(k+1)

The "Coefficient of Variation" is a measure of:

• Absolute variability.

• Relative variability.

• Central tendency.

• Symmetry in data distribution.

What does "Data Array" refer to?

• A graphical representation of data.

• A measure of central tendency.

• A collection of data values arranged in a specific order.

• A statistical method for hypothesis testing.

What is a "Decile" in the context of statistical measures?

• A measure that divides a data set into ten equal parts.

• A measure that divides a data set into four equal parts.

• A measure that divides a data set into 100 equal parts.

• A measure that divides a data set into two equal parts.

The "Empirical Rule" is also known as the:

• 50-75-100 rule.

• 68-95-99.7 rule.

• 70-95-99.5 rule.

• 60-80-90 rule.

What is the main goal of "Exploratory Data Analysis (EDA)"?

• To confirm the validity of statistical models.

• To analyze data sets to summarize their main characteristics using various techniques.

• To calculate the probability of events based on data.

• To create predictive models for future data trends.

What does the "Five-Number Summary" include?

• Mean, median, mode, range, and standard deviation.

• Minimum, first quartile, median, third quartile, and maximum.

• Mean, median, mode, variance, and standard deviation.

• Minimum, median, maximum, range, and interquartile range.

The "Interquartile Range (IQR)" is calculated as the difference between:

• The third and second quartiles.

• The fourth and first quartiles.

• The third and first quartiles.

• The second and first quartiles.