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Who demanded that Japan open its ports for refueling of and trade with American shipping?
Chi-square Statistic
A value used to assess how well observed frequencies match expected frequencies, important in evaluating categorical data relationships.
Puerto Ricans
A term referring to people who are citizens of Puerto Rico or those of Puerto Rican descent.
Two-Way Tables
Two-way tables categorize data into two dimensions, helping to analyze the relationship between two categorical variables.
Null Hypothesis
A default statement that there is no effect or no difference, used as a starting point for statistical hypothesis testing.
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