Skewness identification and interpretation

1 At a tourist information office the numbers of people seeking information each hour over the course of a 12-hour day are shown below. $$\begin{array} { l l l l l l l l l l l l } 6 & 25 & 38 & 39 & 31 & 18 & 35 & 31 & 33 & 15 & 21 & 28 \end{array}$$

1. Construct a sorted stem and leaf diagram to represent these data.
2. State the type of skewness suggested by your stem and leaf diagram.
3. For these data find the median, the mean and the mode. Comment on the usefulness of the mode in this case.

3 The stem and leaf diagram illustrates the heights in metres of 25 young oak trees. Key: 4 |2 represents 4.2

1. State the type of skewness of the distribution.
2. Use your calculator to find the mean and standard deviation of these data.
3. Determine whether there are any outliers.

1 The stem and leaf diagram illustrates the heights in metres of 25 young oak trees. Key: 4 |2 represents 4.2

1. State the type of skewness of the distribution.
2. Use your calculator to find the mean and standard deviation of these data.
3. Determine whether there are any outliers.

3 The stem and leaf diagram shows the weights, rounded to the nearest 10 grams, of 25 female iguanas. Key: 11 | 2 represents 1120 grams

1. Find the mode and the median of the data.
2. Identify the type of skewness of the distribution.

1 The stem and leaf diagram shows the weights, rounded to the nearest 10 grams, of 25 female iguanas. Key: 11 | 2 represents 1120 grams

1. Find the mode and the median of the data.
2. Identify the type of skewness of the distribution.