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Course: AP??/College Statistics?>?Unit 11
Lesson 1: Constructing a confidence interval for a population mean- Introduction to t statistics
- Simulation showing value of t statistic
- Conditions for valid t intervals
- Reference: Conditions for inference on a mean
- Conditions for a t interval for a mean
- Example finding critical t value
- Finding the critical value t* for a desired confidence level
- Example constructing a t interval for a mean
- Calculating a t interval for a mean
- Confidence interval for a mean with paired data
- Making a t interval for paired data
- Interpreting a confidence interval for a mean
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Conditions for a t interval for a mean
Problem
Nolan was studying birth weights of infants in Somalia. He took an SRS (simple random sample) of births and calculated a sample mean birth weight of . The sample data was slightly skewed with a few outliers. He is considering using his data to construct a confidence interval for the mean birth weight in Somalia.
Which conditions for constructing a interval have been met?