1000 Companies
from the Top 1000 Companies in Valuation,a Comparison

1000 companies
From the top 1000 companies in valuation,a comparison of the mean dividend yield of the top and bottom ten electric utility companies is desired.Let 1 = top ten,and 2 = bottom ten,electric utility companies respectively.The data shown below are for two independent samples,which are drawn at random from populations that are normally distributed. $$\begin{array} { | c | c | } \hline \text { Top ten } & \text { Bottom ten } \\\hline 8.76 & 6.65 \\8.96 & 6.38 \\7.20 & 6.24 \\8.92 & 6.93 \\8.61 & 7.46 \\7.81 & 0.00 \\6.58 & 7.78 \\8.06 & 8.64 \\6.42 & 7.35 \\6.64 & 7.33 \\\hline\end{array}$$
-Use Minitab or Excel to conduct a two-sample t-test to test the hypotheses:
H₀: $\mu _ { 1 } = \mu _ { 2 }$ H₁: $\mu _ { 1 } \neq \mu _ { 2 }$ at the 5% significance level.