1. The problem asks to describe the spread and shape of the distribution shown in the dot plot. 2. To find the mean score, use the formula for the mean: $$\text{mean} = \frac{\sum \text{(value} \times \text{frequency)}}{\sum \text{frequency}}$$. The mean represents the average score. 3. To find the median score, list all scores in order and find the middle value. The median represents the middle score when data is ordered. 4. Consider how the mean and median would change if only the top 10 grades are used. Generally, the mean and median will increase because lower scores are excluded. 5. To find the mean of the top 10 scores, sum those scores and divide by 10. 6. To find the median of the top 10 scores, order those scores and find the middle value (average of 5th and 6th scores). Since the exact data points and frequencies are not provided, numerical answers cannot be calculated here. Please provide the data values and frequencies for precise calculations.