A sample of 31 observations yielded a sample variance of 16. If we want to test H₀: σ² = 16, the test statistic is A) 20. B) 21. C) 30. D) 7.5.

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Quizplus · Accepted Answer

The test statistic for testing the population variance is calculated using the formula: (n-1)s²/σ², where n is the sample size, s² is the sample variance, and σ² is the hypothesized population variance. Here, (31-1)*16/16 = 30.

A Sample of 31 Observations Yielded a Sample Variance of 16