Nossi ch 11

Slide 1: Chapter 11 Inferential Statistics

Slide 2: Section 11.1 Normal Distributions • Goals • Study normal distributions • Study standard normal distributions • Find the area under a standard normal curve

Slide 3: 11.1 Initial Problem • A class of 90 students had a mean test score of 74, with a standard deviation of 8. • If the professor curves the scores, how many students will get As and how many will get Fs? • The solution will be given at the end of the section.

Slide 4: Statistical Inference • The process of making predictions about an entire population based on information from a sample is called statistical inference.

Slide 5: Data Distributions • For large data sets, a smooth curve can often be used to approximate the histogram.

Slide 6: