Discussion 6 (Chapter 12: Statistics)

It is recommended that students complete this chapter MyLab Math assignments before submitting this assignment. For each discussion, students will post their answers to the question set.

Blitzer, Robert. Thinking Mathematically. 7th ed. Boston, Pearson, 2019.

1. (3 points) For the following data items given: 8, 10, 12, 14, 16, 18, 20 find:
2. Mean
3. Range
4. Standard deviation

1. (3 points) Intelligence quotients (IQs) on the Stanford-Binet intelligence test are normally distributed with a mean of 100 and a standard deviation of 16. Use the 68-95-99.7 Rule to find the percentage of people with IQs between 84 and 116.

1. (4 points) A set of data items is normally distributed with a mean of 60 and a standard deviation of 8. Convert data item 72 to a z-score.