Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

An office building in New York uses thousands of fluorescent light bulb each year. The brand of bulb it currently uses has a mean life of 900 hours. A manufacturer claims that its new brand of bulbs, which cost the same as the brand the office building currently uses, has a mean life of more than 900 hours. The university has decided to purchase the new brand if, when tested, the test evidence supports the manufacturer's claim at the .05 significance level. Suppose 64 bulbs and the sample has a mean of 920 hours and a standard deviation of 80 hours.

• What are the null hypothesis and the alternative hypothesis?

• Should the office building purchase the new brand of florescent bulbs? (i.e. test your hypothesis using a z-test)

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M944340

Have any Question? 


Related Questions in Statistics and Probability

Net exports are calculated by subtracting imports from

Net Exports are calculated by subtracting Imports from Exports. Assume Exports and Imports are independent of one another.  If mean exports are $25M with a standard deviation of $3.5M and mean imports are $30M with a sta ...

What was the hellenistic age and how did it come to be what

What was the Hellenistic age and how did it come to be? What are some special characteristics of Hellenistic cities, art, culture, thought, and achievements? What were some of the major contributions of the Hellenistic a ...

What is the estimate for the difference between

What is the estimate for the difference between ‘False-rejects' by Inspectors 2 and 5? 0.8 3.7 4.2 0.0 3.5

1 interpret in your own words the meaning of the computer

1. Interpret in your own words the meaning of the computer printout in Table 1. 2. Explain the meaning of the regression equation and the regression line as shown in Table 2. 3. What is meant by "partitioning the sum of ...

Read full english transcript of osama bin ladens speechwhat

Read: full English transcript of Osama bin Laden's speech What are some examples of bin Laden's complaints against Western society? What seems to be his plan for the Islamic world?

One of the most famous labormanagement conflicts took place

One of the most famous labor/management conflicts took place in the 1902 Coal Strike in Pennsylvania. The strike brought the coalmine owner George Baer against the United Mine Workers Union, and led Theodore Roosevelt to ...

A smartphone company has to decide which battery they will

A smartphone company has to decide which battery they will use for their upcoming model. Two battery manufacturers A and B are competing to get the contract. 15 smartphones of the upcoming model were tested with batterie ...

Requirements the objective is ldquoan analysis of the

Requirements (The objective is “An analysis of the changes in recorded crime via authority over time”.) Assignment concerns a report on a provided data file and be expected to demonstrate a single variate analysis utilis ...

Assume that womens heights are normally distributed with a

Assume that women's heights are normally distributed with a mean given by mu equals 63.3 in, and a standard deviation given by sigma equals 3.1 in. Complete parts a and b. a. If 1 woman is randomly selected, find the pro ...

Listed below is a list of how long it takes for bands on

Listed below is a list of how long it takes for bands on stage to complete their first song (in seconds). 538 312 327 309 344 313 318 315 325 331 312 314 What is the mean time it takes for bands on stage to complete thei ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro