The following are measurements of the heat-producing capacity (in millions of calories per ton) o random samples of five specimens each of coal from two mines: Mine 1: 8380 8210 8360 7840 7910 Mine 2: 7540 7720 7750 8100 7690 Below are the EXCEL outputs of the data at 95% confidence level: t-Test: Paired Two Sample for Means t-Test: Two-Sample Assuming Equal Vari MINE 1 MINE 2 MINE 1 MINE 2 Mean 8140 7760 Mean 8140 7760 Variance 63450 42650 Variance 63450 42650 Observations Observations Pearson Correlation-0.69059 Pooled Variance 53050 Hypothesized Mear df Hypothesized Me df 4 t Stat 2.014279 t Stat 2.608621 P(T<=t) one-tail t Critical one-tail P(T<=t) one-tail t Critical one-tail 0.05712 0.015599 2.131847 1.859548 P(T<-t) two-tail t Critical two-tail P(T<=t) two-tail t Critical two-tail 0.11424 0.031197 А. 2.776445 В. 2.306004 22. Which of the two excel output above is the correct result of the data. B. Choice B A. Choice A C. Both D. None 23. What is the appropriate set of hypotheses for this test? A. H.: H1 - H2 <0 vs HA: H1- Hz>0 B. Ho: H1 - H2 = 0 vs HA: H1 - H2 #0 C. Ho: H1 - Hz 20 vs HA: H- H2 =0 D. Ho: H1 - Hz 20 vs HA: Hy - H2>0

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