Statistics - One-tailed or Two-tailed Test
Not what you're looking for?
1) How can you tell, from a verbal hypothesis statement, whether you are conducting a one-tailed or two-tailed test?
2) Suppose you were the manufacturer of a new and improved light bulb that you claim has an average service life more than twice the life of your nearest competitor's product. You want to test your product to be sure. You test 500 of your bulbs in the lab and find that the average life of your bulbs is 2021 hours. Your competitor claims an average service life of 1000 hours. What hypotheses would you test? State the null and alternative hypotheses both verbally and algebraically.
Purchase this Solution
Solution Summary
The one-tailed or two-tailed test is examined. The expert discusses the verbal hypothesis statement. Neat, step-by-step solutions are provided.
Solution Preview
(1) The test here is a one-tailed test because we are testing "uni-directionally". That is, we are testing to see if the mean life of ...
Purchase this Solution
Free BrainMass Quizzes
Know Your Statistical Concepts
Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.
Measures of Central Tendency
This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.