Mining gold is tough One study found a difference between sa

Mining gold is tough. One study found a difference between sample means of 557 kg of raw ore required to extract but 1 ounce of gold. State the null and alternative hypotheses If sigma = 374 by prior mining extraction studies in this geographic area, calculate a test statistic. At what level of significance would you reject the null hypothesis?

Solution

a) A null hypothesis is a hypothesis that says there is no statistical significance between the two variables. It is usually the hypothesis a researcher or experimenter will try to disprove or discredit.

An alternative hypothesis is one that states there is a statistically significant relationship between two variables.

Usually, the null hypothesis is a statement of \'no effect\' or \'no difference\'. It is often symbolized as H₀. The statement that is hoped or expected to be true instead of the null hypothesis is the alternative hypothesis. Symbols include H₁ and H_a.

c) Statistical significance test: \"Very roughly, the procedure for deciding goes like this: Take a random sample from the population. If the sample data are consistent with the null hypothesis, then do not reject the null hypothesis; if the sample data are inconsistent with the null hypothesis, then reject the null hypothesis and conclude that the alternative hypothesis is true\".