Describing Data Distributions

What is a bar graph?

• A chart that presents categorical data with rectangular bars representing the frequency of each category.

• A type of graph that uses lines to connect data points over time.

• A visual representation of data using pie slices to show proportions.

• A diagram that displays data in a circular format, showing relationships between parts and a whole.

What is an outlier?

• A data point that is significantly different from other observations in a dataset.

• A data point that is the average of all observations in a dataset.

• A data point that is the most frequently occurring in a dataset.

• A data point that is always the highest value in a dataset.

What does it mean if a distribution is skewed right?

• A right-skewed distribution has a longer tail on the right side, indicating that most data points are concentrated on the left.

• A right-skewed distribution has a longer tail on the left side, indicating that most data points are concentrated on the right.

• A right-skewed distribution has equal tails on both sides, indicating a normal distribution.

• A right-skewed distribution indicates that all data points are clustered around the mean.

What does it mean if a distribution is skewed left?

• A left-skewed distribution has a longer tail on the left side, indicating that most data points are concentrated on the right.

• A left-skewed distribution has a longer tail on the right side, indicating that most data points are concentrated on the left.

• A left-skewed distribution is symmetrical with equal tails on both sides.

• A left-skewed distribution indicates that all data points are clustered around the mean.

What is a skewed distribution?

• A distribution where data is evenly spread across all values.

• A distribution that has a tail on one side, indicating uneven data distribution.

• A distribution that is symmetrical around the mean.

• A distribution that only contains positive values.

What is the importance of understanding data distributions?

• It helps in analyzing data patterns, making predictions, and drawing conclusions from data.

• It is only relevant for statistical analysis and not for practical applications.

• It complicates the data analysis process unnecessarily.

• It is primarily used for data storage and retrieval.

What is a bell curve?

• A type of symmetrical distribution resembling a bell shape, often seen in normal distributions.

• A curve that represents the relationship between two variables in a scatter plot.

• A statistical method used to calculate the mean of a data set.

• A graphical representation of data that shows the frequency of data points.

What is the shape of a distribution that has most data points concentrated at one end?

• Uniform

• Normal

• Skewed

• Bimodal

What does it mean if a distribution is symmetrical?

• A symmetrical distribution has a mirror image on either side of the center, meaning the left and right sides are identical.

• A symmetrical distribution has a peak at one end and tails that taper off.

• A symmetrical distribution is always uniform across all values.

• A symmetrical distribution has no defined center point.

What is a histogram?

• A graphical representation of the distribution of numerical data, using bars to show frequency.

• A type of chart that displays categorical data using lines.

• A method for calculating the mean of a data set.

• A visual representation of data that uses pie slices to show proportions.