Inference for One Mean
This item is included in the following series/curriculum: Statistically Speaking
- Grade Level: Senior High (10-12)-Adult
- Subjects: Business mathematics
- Produced By: Coast Learning Systems
- Year: 2011
- Country: United States
- Language: English
- Running Time: 30m
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This lesson pursues a more realistic test of significance than the z test discussed in Lesson 15. In that lesson, you learned to use the z test to determine whether or not a sample population mean is significantly different from the claimed population mean. The z-test assumes that we know the population standard deviation ?. In reality, we rarely know ?. In this lesson, you will learn how researchers get around that problem by using a different test with more realistic parameters.