The median is the middle value when data is sorted in order. First, sort the data: [10, 12, 14, 16, 18]. Since there are 5 values (odd count), the median is the middle (3rd) value $= 14$. The median provides a measure of central tendency that is not affected by extreme values.

The median is the middle value when data is sorted in order. First, sort the data: [5, 7, 8, 9, 12]. Since there are 5 values (odd count), the median is the middle (3rd) value = 8. The median is resistant to extreme values and represents the central tendency.

The mode is the value that appears most frequently in the dataset. Counting frequencies: 7 appears 2 times, 9 appears 3 times, 5 appears 1 time. Since 9 appears most frequently (3 times), the mode is 9. Choice B gave 7, which appears only twice.

The mean is calculated by finding the sum of all values and dividing by the count. Sum = 3 + 7 + 5 + 10 + 8 = 33. Count = 5 values. Mean = 33 ÷ 5 = 6.6. Choice B gave 7, which would be incorrect arithmetic.

The range is calculated as the difference between the maximum and minimum values. First, identify the maximum value (33) and minimum value (14). Range = maximum - minimum = 33 - 14 = 19. The range provides a simple measure of how spread out the data values are.

The median is the middle value when data is sorted in order. First, sort the data: [5, 7, 9, 13, 15]. Since there are 5 values (odd count), the median is the middle (3rd) value $= 9$. The median divides the dataset into two equal halves.

The mode is the value that appears most frequently in the dataset. Counting frequencies: 3 appears 3 times, 8 appears 1 time, 5 appears 1 time, 9 appears 1 time, 2 appears 1 time. Since 3 appears most frequently, the mode is 3.

The range is calculated as the difference between the maximum and minimum values. First, identify the maximum value (25) and minimum value (11). Range = maximum - minimum = 25 - 11 = 14. The range indicates the total span of values from the smallest to the largest data point.

The median is the middle value when data is sorted in order. First, sort the data: [22, 23, 28, 29, 34]. Since there are 5 values (odd count), the median is the middle (3rd) value = 28. The median represents the value that divides the ordered dataset in half.

To determine skewness, examine the distribution of values and where the tail extends. The data [1, 2, 2, 3, 4, 4, 4, 5, 6] has most values clustered on the lower end with fewer values extending toward higher numbers. This creates a right-skewed (positively skewed) distribution where the tail extends to the right. Choice B (skewed left) would have the opposite pattern.