Electricity consumption by single-family homes in two separate countries
Not what you're looking for?
A large public utility company wants to compare the consumption of electricity during the summer season for single-family houses in two counties that it services. For each household sampled, the monthly electric bill is recorded with the following results:
(Note the italicized X below should have a line above it.)
X $115 $98
S $30 $18
n 25 21
Use a level of significance of 0.01 or (99% confidence), and use statistical inference (confidence intervals or tests of hypotheses).
Question:
(a) Is there evidence that the mean monthly bill is higher in County I than in County II?
(b) Estimate the mean difference between the monthly bill of County I and County II.
Purchase this Solution
Solution Summary
The solution contains hypothesis testing examples.
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.
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.
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.