Explain How to Draw a Conclusion for One- and Two-Tailed

question 25

Multiple Choice

Explain how to draw a conclusion for one- and two-tailed hypothesis tests. LO2: Compare and contrast the major types of hypothesis testing for one-sample tests
-Which of the following is true about one-tailed and two-tailed tests?

• A) For standard normal and t-distributions, which have a mean of zero, lower-tail critical values are negative and upper-tail critical values are positive.
• B) For an upper one-tailed test, if the test statistic is greater than the critical value, the decision would be to fail to reject the null hypothesis.
• C) For a lower one-tailed test, if the test statistic is less than the critical value, the decision would be to fail to reject the null hypothesis.
• D) For a two-tailed test, if the test statistic is either greater than the upper critical value or less than the lower critical value, the decision would be to fail to reject the null hypothesis.

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Definitions:

Overall Average

The mean value calculated from the sum of all elements in a dataset divided by the total number of elements.

Statistics

The practice or science of collecting and analyzing numerical data in large quantities, especially for inferring proportions in a whole from those in a representative sample.

Electrolysis

A chemical process in which electrical current is passed through a substance to effect a chemical change, commonly used for metal plating and water splitting.

Moles

A mole is a unit of measurement in chemistry representing 6.022 x 10^23 particles of a substance, used to express the amount of a chemical substance.