# Chapter 8 - Hypothesis Testing - 8-5 Testing a Claim About a Standard Deviation or Variance - Basic Skills and Concepts: 3

90%, same results.

#### Work Step by Step

The hypothesis test should have: $\alpha=2\cdot 0.05=0.1=1-0.9$, hence the confidence interval level should be 90%. The hypothesis test with 90% confidence interval should give the same results as the critical value method or the P-value method.

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