At the 5% significance level, is there a significant overall difference between the proportion who used condoms in the different grades? In other words, perform a chi-squared test for independence. (See image for data)

Q: What is the 73rd percentile of a normal curve? * Previous

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Q: What is measured by the numerator of the z-score test statistic?

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Q: What are the assumptions when you use a Z score?

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.