D15 U7 CIA Review Flashcardizz

Front

What is a left skewed distribution?

Back

A left skewed distribution is one where the tail on the left side is longer or fatter than the right side, indicating that most data points are concentrated on the right.

Front

What is a right skewed distribution?

Back

A right skewed distribution is one where the tail on the right side is longer or fatter than the left side, indicating that most data points are concentrated on the left.

Front

What does Q1 represent in a data set?

Back

Q1, or the first quartile, represents the value below which 25% of the data falls.

Front

What is correlation?

Back

Correlation is a statistical measure that describes the extent to which two variables change together, but it does not imply causation.

Front

What does a correlation coefficient of r = 0.45 indicate?

Back

A correlation coefficient of r = 0.45 indicates a weak positive correlation between the two variables.

Front

How do you calculate the percentage of data within a range?

Back

To calculate the percentage of data within a range, divide the number of data points in that range by the total number of data points and multiply by 100.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation indicates that one variable directly affects the other.

Front

What is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, showing the frequency of data points within specified ranges.

Front

What does it mean if a histogram is skewed?

Back

If a histogram is skewed, it means that the data is not evenly distributed, with a longer tail on one side.

Front

What is the significance of the median in a data set?

Back

The median is the middle value of a data set when it is ordered, and it divides the data into two equal halves.