Discuss about the null and alternative hypotheses

Reference no: EM132129955

Question: In an effort to reduce energy costs, a major university has installed more efficient lights as well as automatic sensors that turn the lights off when no movement is present in a room. Historically, the cost of lighting an average classroom for 1 week has been $265. To determine whether the changes have signficantly reduced costs, the university takes a sample of 50 classrooms. They find that the average cost for 1 week is $247 with a standard deviation of $60. When testing the hypothesis (at the 5% level of significance) that the average energy use has decreased from the past, the null and alternative hypotheses would be which of the following?

Reference no: EM132129955

Questions Cloud

Shouldice hospital limited case study : What advice would you give them concerning the future development of Shouldice Hospital as a business?

What is the role of effective transfer pricing methodology : How does having effective performance methodologies allow a firm to adequately measure economic performance? What is the role of an effective transfer pricing.

Create a flyer for families to announce an event : Five different types of poetry pieces with information about the potential students who will read aloud or recite the poetry.

Describe how ikea grows and protects : Describe how IKEA grows and protects its core business? and what are the important decisions that IKEA must make in developing branding strategy

Discuss about the null and alternative hypotheses : In an effort to reduce energy costs, a major university has installed more efficient lights as well as automatic sensors that turn the lights off.

What are the different types of survey research error : What are the different types of survey research error and describe an example of each.

Define the meaning of picaresque and the plot in don quixote : Define the meaning of picaresque and the plot in Don Quixote. Why do you think this story is considered a magnificent piece of literature?

Measuring customers satisfaction of the people : The owner of a hardware store in Eureka, CA is interested in measuring customers satisfaction of the people that buy something into her store.

Explain the problem that some philosophers see : In your own words, explain and summarize the main ideas in the section "The Ecological Conscience." Give some complaints that he has, too.

User Account

All Pages