If you cross-multiply and you obtain an equality, then the proportion is true.
Example:
2/3 = 20/30 ? cross-multiply;
2 x 30 = 3 x 20 ?
60 = 60
Since we have an equality, the proportion is true.
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There is a 95% probability that the true population proportion lies within the confidence interval.
40,50,80,64
what are 2 ways you can tell that 2 ratios from a propotion
direct proportion: y=kx inverse proportion: y=k/x
Yes, they are in the proportion of the proportion that they form!