Assignments and due dates for each chapter are announced in class. Typical problems include:
3-2 page 86
2 to 24, even numbered problems
Do not calculate the mode or the midrange since we will not use either of these measures.
3-3 page 104
2 to 24, even numbered problems
Do not use formulas 3-4 or 3-5 (page 94) to compute the standard deviation. Use STATDISK or a calculator's built-in functions or a spreadsheet's built-in functions to compute the standard deviation.
3-4 page 116
2 to 14, even numbered problems
3-5 page 126
2 to 12, even numbered problems
Chapter 3-2: Measures of Center
The most important measure of center of the data is the mean. In descriptive statistics, sometimes the median is useful as well.
When there are extreme outliers in the data, the mean is skewed right if the outlier is much larger than the mean and the mean is skewed left if the outlier is much smaller than the mean.
On the other hand the median is much less resistant to skewing by extreme outliers
We will not compute the mean from a frequency table (page 83) or use formula 3-2 so you can skip that topic. However Figure 3-1 on page 85 is an excellent summary of measures of center.