13.6 Measures of Central Tendency and Dispersion

Front

What is the range in a data set?

Back

The range is the difference between the highest and lowest values in a data set.

Front

How do you calculate the range of the heights: 158cm, 172cm, 164cm, 164cm, 167cm, 159cm?

Back

Range = Highest value - Lowest value = 172cm - 158cm = 14cm.

Front

What is the median in a data set?

Back

The median is the middle value when the data set is ordered from least to greatest.

Front

How do you find the median of the scores: 76, 85, 97, 83?

Back

Order the scores: 76, 83, 85, 97. Median = (83 + 85) / 2 = 84.

Front

What is the median cost of the cell phones priced at $345, $400, $110, and $640?

Back

Order the prices: $110, $345, $400, $640. Median = (345 + 400) / 2 = $372.50.

Front

What is the mode in a data set?

Back

The mode is the value that appears most frequently in a data set.

Front

What is the mode of the data set: 5, 7, 7, 8, 12, 12, 5, 6, 13, 12?

Back

The mode is 12, as it appears most frequently.

Front

What is the mode of the pumpkin weights: 22, 21, 24, 24, 5, 24, 5, 23, 24, 24?

Back

The mode is 24, as it appears most frequently.

Front

What is the mean in a data set?

Back

The mean is the average of all values, calculated by dividing the sum of the values by the number of values.

Front

How do you calculate the mean of the scores: 76, 85, 97, 83?

Back

Mean = (76 + 85 + 97 + 83) / 4 = 85.25.