There are two main data analysis methods based on mathematical statistics: descriptive analysis method and inferential analysis method.
1. Descriptive analysis method
2. Inferential analysis methods: estimation and testing
1. Estimation: If the overall information is unknown, the overall information needs to be estimated
- Steps of parameter estimation:
√ Selected parameters: population (mean μ, μ1-μ2; The ratio π, π1-π2; Variance σ^2, variance ratio
√ Selected statistics: sample (mean x_bar; Ratio P, variance S ^2) √ Sampling distribution
Tick to estimate
2, test: know part of the overall information, but do not know whether it is correct, need to test
