Hypothesis Testing for Evidence
Not what you're looking for?
Suppose that in January 1999 it was reported that 58 percent of Americans rated the condition of the economy to be ``fairly good.'' In a Gannett News Service poll of 1003 Americans taken October 15--20, 1999, and reported in the October 31, 1999, issue of the Cincinnati Enquirer, 62 percent of those polled rated the condition of the economy to be "fairly good.'' (source: C. Raasch, "At 2000, Americans Guardedly Optimistic," Gannett News Service)
a)Set up and carry out a hypothesis test that attempts to provide evidence supporting the claim that the proportion of Americans rating the condition of the economy to be "fairly good'' in October 1999 is higher than the proportion of 58 percent in January 1999.
b)Use the sample results to determine how much evidence there is that the proportion of Americans rating the condition of the economy to be "fairly good'' in October 1999 is higher than the proportion of 58 percent in January 1999.
Purchase this Solution
Solution Summary
The solution examines hypothesis testing for evidence. The hypothesis test is used to provide evidence supporting the claim that the proportion of American rating the condition of the economy to be `fairly good`in October 1999 is higher than the proportion of 58 percent in January 1999.
Solution Preview
a)
Step 1:
Null hypothesis:
H0:
The population proportion of Americans rating the condition of the economy to be "fairly good' in October 1999 is equal to the proportion of 58 percent in January 1999.
Alternate Hypothesis:
H1:
The population ...
Purchase this Solution
Free BrainMass Quizzes
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.
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.