Descriptive Statistics Warmup

The data value that occurs the most

• Mean

• Median

• Mode

• Range

Answer explanation

The mode is the data value that occurs most frequently in a dataset. Unlike the mean and median, which represent averages or middle values, the mode specifically identifies the most common value.

What is the median of the data?
2, 7, 11, 12, 12, 16, 19, 21

• 2

• 12

• 17.5

• 24

Answer explanation

To find the median, arrange the data in order: 2, 7, 11, 12, 12, 16, 19, 21. With 8 numbers, the median is the average of the 4th and 5th values: (12 + 12) / 2 = 12. Thus, the median is 12.

Which is the MIDDLE?

• Mean

• Median

• Mode

• Range

Answer explanation

The median is the middle value in a data set when arranged in order. Unlike the mean, which is the average, or the mode, which is the most frequent value, the median specifically identifies the center point.

Find the mean of these numbers:
5,11,2,12,4,2

• 4.1

• 6

• 4.5

• 4

Answer explanation

To find the mean, add the numbers: 5 + 11 + 2 + 12 + 4 + 2 = 36. Then divide by the count of numbers (6): 36 / 6 = 6. Thus, the mean is 6.

Which statement correctly describes the shapes of the dot plots for cars and SUVs?

• SUVs: symmetrical
  Cars: skewed left

• Both are skewed left

• Both are symmetrical

• SUVs: skewed right
  Cars: Skewed left

Answer explanation

The correct choice states that SUVs are skewed right and cars are skewed left. This indicates that the distribution of SUV data has a longer tail on the right, while car data has a longer tail on the left.

What type of graph is this?

• Bar Graph

• Histograph

• Pictograph

• Scatter Plot

Answer explanation

The graph is a Bar Graph because it uses rectangular bars to represent data values. Each bar's length corresponds to the value it represents, making it easy to compare different categories visually.