Читать книгу Student Study Guide to Accompany Statistics Alive! - Wendy J. Steinberg - Страница 13

1 Mean = 5, mode = 5.

2 

3 Sum above = 16. Sum below = −16. The difference is 0. Neither is greater. The mean is the balance point of the distribution.

4 It would appear normally distributed because the mean, median, and mode are equal.

5 Mean = 6.67, median = 6.1, mode = 5. The mean has changed the most.

6 Mean = 5, median = 5, mode = 5. None of them would have changed.

7 If we were to add a score of 45, the distribution would have a strong positive skew. If we were to add another score of 5, the distribution would still appear normal (symmetrical).

8 40

9 

10 Positively skewed

11 The median, because it is a skewed distribution.

12 n = 4