Hypothesis testing
Not what you're looking for?
Statistics-prob-value approach and then the traditional approach
1. In a recent year, some professional baseball players complained that umpires were calling more strikes than the average rate of 61.0% called the previous year. At one point in the season, umpire Dan Morrison called strikes in 2231 of 3581 pitches (based on data from USA Today). Use a 0.05 significance level to test the claim that his strike rate is greater than 61.0%.
2. In order to monitor the ecological health of the Florida Everglades, various measurements are recorded at different times. The bottom temperatures are recorded at the Garfield Bight station and the mean of 30.4ºC is obtained for 61 temperatures recorded on 61 different days. Assuming that = 1.7ºC, test the claim that the population mean is greater than 30.0ºC. Use a 0.05 significance level. (Use classical approach)
Purchase this Solution
Solution Summary
This shows how to use significance level to test hypotheses.
Solution Preview
Please see the attached files.
1. In a recent year, some professional baseball players complained that umpires were calling more strikes than the average rate of 61.0% called the previous year. At one point in the season, umpire Dan Morrison called strikes in 2231 of 3581 pitches (based on data from USA Today). Use a 0.05 significance level to test the claim that his strike rate is greater than 61.0%.
Hypothesis: H0: p = 0.61 vs. HA: p > 0.61
Level of Significance: = 5%
Decision Rule: Reject the null hypothesis if z > z0.05 = 1.645
or p-value < ...
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.