In this lesson you’ll learn how to find the molar mass of chemical compounds given the molar mass of individual atoms, and how to find the molar mass of individual atoms given the molar mass of a compound or molecule.
Read More
When you have complex fractions as a proportion you can solve for the variable or rewrite them by using cross multiplication. After cross multiplication, you’ll end up with a fraction set equal to another fraction, and you can then use cross multiplication a second time.
Read More
Because the two ratios in a proportion are equal to each other, a proportion is an equation that expresses the equivalence of two fractions. So a ratio is just a fraction, and a proportion is an equation that sets two fractions equal to each other.
Read More
Up to now we’ve been focused mostly on hypothesis testing for the mean, but we can also perform hypothesis tests for a proportion. In order for the test to work, we’ll need np≥10 and n(1-p)≥10, where p is the probability of a success, and 1-p is the probability of failure.
Read More
With any hypothesis test, we need to state the null and alternative hypotheses, then determine the level of significance. We’ve already covered these first two steps, and now we want to learn how to calculate the test statistic, which will depend on whether we’re running a two-tail test or a one-tail test.
Read More