Purchase Solution

Electricity consumption by single-family homes in two separate countries

Not what you're looking for?

Ask Custom Question

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.

Attachments
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.

View More Free Quizzes
Related BrainMass Solutions

  • Normal Probability

    In one region, the September energy consumption data for single-family homes are found to be normally distributed with a mean of 1050 kilowatts (kW) and a standard deviation of 218 kW a) (2) What is the probability that a single-family home in that

  • Applying a Regression Analysis to Electricity Consumption

    home would like to develop a model to predict electricity consumption in his house, based on average atmospheric temperature in degrees Fahrenheit.

  • Probability and Normal Distribution Indicator

    If an applicant is randomly selected, find the probability of a rating that is between 200 and 275. 5) In one region, the September energy consumption levels for single family homes are found to be normally distributed with a mean of 1050 kWh and a

  • Marketing of Services

    In case of electricity utility the inseparability of service makes it difficult to separate a service from the service provider. The electricity utility faces issues such as aging infrastructure, government regulation, and reliability of service.

  • Single-Family Home Appraisals In Two Communities

    214751 Single-Family Home Appraisals In Two Communities A real estate agency wants to estimate the difference in the appraised values of single-family homes in two communities.

  • STATSITICS

    The median shows that the mid value i.e. the value that divides or separate the whole values is 873 for electricity consumption and $71.35 for the billing amount. //Above is the discussion of problem described in the case.

  • Venn Diagram

    7 to single-family homes with more than one telephone line -- in black and green circles * 9 to people who were satisfied with their long-distance provider and had more than one line -- in green and purple circles * 16 to single-family homes --

  • Rebound Effect: Energy Efficiency

    ExxonMobil claims that energy efficiency will be effective in OECD countries but not in non- OECD countries. The Outlook report further assumes that 40 percent of the total primary energy demand will be electricity generation.

  • Explain why Bovis Homes might need activity-based costing

    New Bovis Homes developments offer a wide range and choice of homes. From one and two bedroom apartments and coach houses, to three-storey living and spacious, detached family homes".

View More Related Solutions