07) HS: Measures of Central Tendency

Front

What is the median in a data set?

Back

The median is the middle value of a data set when the values are arranged in ascending order. If there is an even number of values, the median is the average of the two middle values.

Front

How do you find the median of an odd number of data values?

Back

For an odd number of data values, the median is the value located at the position given by the formula (n + 1) / 2, where n is the number of data values.

Front

How do you find the median of an even number of data values?

Back

For an even number of data values, the median is the average of the two middle values, which are located at positions n/2 and (n/2) + 1.

Front

What does it mean if a data distribution is skewed left?

Back

If a data distribution is skewed left, it means that the left tail of the distribution is longer or fatter than the right tail. In this case, the mean is typically less than the median.

Front

What does it mean if a data distribution is skewed right?

Back

If a data distribution is skewed right, it means that the right tail of the distribution is longer or fatter than the left tail. In this case, the mean is typically greater than the median.

Front

What is the mean of a data set?

Back

The mean is the average of all the data values, calculated by summing all the values and dividing by the number of values.

Front

How do you calculate the mean of a data set?

Back

To calculate the mean, sum all the data values and divide by the total number of values: Mean = (Sum of values) / (Number of values).

Front

What is the relationship between mean, median, and mode in a normal distribution?

Back

In a normal distribution, the mean, median, and mode are all equal and located at the center of the distribution.

Front

What is the mode of a data set?

Back

The mode is the value that appears most frequently in a data set. A data set may have one mode, more than one mode, or no mode at all.

Front

How do you find the mode of a data set?

Back

To find the mode, count the frequency of each value in the data set. The value with the highest frequency is the mode.