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Get Ready for Statistics: Corequisites
Arithmetic with Negative Numbers
Add all combinations of positive and negative \(5\) and \(7\).
Subtract \(-3\) from \(-9\).
Add \(-4\) to the difference of \(-2\) and \(5\).
Divide each of the following:
\(\dfrac{6}{3}\)
\(\dfrac{6}{-3}\)
\(\dfrac{-6}{3}\)
\(\dfrac{-6}{-3}\)
Simplify the expression \(\dfrac{68-72}{5}\)
Divide \(\dfrac{3}{4}\div\dfrac{6}{11}\) and reduce to lowest terms.
Divide \(10\div\dfrac{5}{6}\) and reduce to lowest terms.
Add: \(\dfrac{5}{12}+\dfrac{7}{18}\)
Evaluate \(\dfrac{x-\mu}{\sigma}\) if \(x=25\), \(\mu=27.4\), and \(\sigma=4.8\).
Evaluate the expression \(\dfrac{s_1^2}{n_1}+\dfrac{s_2^2}{n_2}\) for the given values of the variables.
\(s_1=3\), \(s_2=4\), and \(n_1=n_2=100\)
\(s_1=1.2\), \(s_2=1.6\), and \(n_1=n_2=100\)
\(s_1=2.5\), \(s_2=3.8\), \(n_1=200\) and \(n_2=100\)
