Mathematics, 14.02.2020 04:50, blkrosesss
Let μ1 and μ2 denote true average densities for two different types of brick. Assuming normality of the two density distributions, test H0: μ1 − μ2 = 0 versus Ha: μ1 − μ2 ≠ 0 using the following data: n1 = 8, x1 = 24.74,s1 = 0.161, n2 = 6, x2 = 20.92, and s2 = 0.250.
1. The degrees of freedom according to the satterthwaite approximation are:
2. Use α = 0.05. Round your test statistic to three decimal places and your P-value to four decimal places.) Use the satterthwaite degrees of freedom for your p-value.
P-value = ?
3. The point estimate and margin of error for the 95% confidence interval for μ1 − μ2 are: (Use the satterthwaite degrees of freedom for your critical value.)
Answers: 2
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