8. It is of interest to compare the measurements of photoresist thick a ss (in k

Question

8. It is of interest to compare the measurements of photoresist thick a ss (in kA) for two samples of wafers baked at two different temperatures (Ho: 1-k vs. HPA ,, ) T: 112, 7.1, 8.1, 11.7, 11.3, 10.8, 6.5, 8.3 T2: 5.3, 6.7, 7.5, 7.0, 8.1, 7.4, 3.8, 9.0 A two-sample t-test was performed with the equal variance assumption. It yields the following results. Two-sample T for T1 vs T2 T1 8 9.372.09 T2 8 6.85 1.63 N Mean StDev SE Mean 0.74 0.58 Difference-mu (T1)-mu (T2) Estimate for difference: 2.525 7-Test of.difference " 0 (vs not =): T-value = 2.69 P-value -lanm DF = 14 Both use Pooled StDev-1.8776 Which of the following statements is true? @ When using = 0.05, we reject Ho. (b) When using = 0.01, we reject Ho. (c) both of them are true (d) none of them is true

Explanation / Answer

here for two tailed as p value is less than 0.05 level and greater than 0.01 we can reject null hypothesis at 0.05 level and fail to reejct at 0.01 level

therefore option A is correct

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