SAT Scores for Students Selected Randomly from Three Different Schools

question 19

Essay

SAT scores for students selected randomly from three different schools are shown below. Use a significance level of 0.05 to test the claim that the samples come from identical populations. $$\begin{array} { rcr | rcr | rcr } &\text { School A }& && \text { School B } &&& \text { School C }\\\hline 550&480&670&500&620&700&460&580&620\\400&60&520&&550&760&380&6020&470\\&&&&&&&&450\end{array}$$

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