An office building in new york

Assignment Help Basic Statistics

Reference no: EM13154721

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)

Reference no: EM13154721

Questions Cloud

You roll 2 dice and consider the sum of the two : Suppose that you roll 2 dice and consider the sum of the two. Let A be the event of throwing odd, B be the event of throwing 4 or less and C be the event of throwing a multiple of 3.a) What is the sample space S and the corresponding probability of e..

Does the diference in response matter : Keeping all elsr constant their answer would likely differ. How do you guess the interviewed will answer? Does the diference in response matter?

What differences in behavior of the victims might you expect : An emissions fee is paid to the government, whereas an injurer, who issued and held liable, pays damages directly to the party harmed by an externality. What differences in the behavior of the victims might you expect to arise under these two arr..

Net receivables to cover sales discounts : Quick Finance assessed a finance charge of 6% of the total accounts receivable factored and retained an amount equal to 2% of the total receivables to cover sales discounts.

An office building in new york : 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

Governmental fund financial statements : Are governmental fund financial statements sufficient for users seeking information about operational accountability? If so, why? If not, what type of information is needed to properly assess the effectiveness of the agency's operations that governme..

Determine the null and research hypotheses : Determine the null and research hypotheses; Select the correct template (templates for the Single Sample t-test, the Independent Samples t-test, and the ANOVA are included in the tabs that follow this tab);

How much heat does your body lose : how much heat does your body lose when 2.95g of sweat evaporates from your skin at 25 degrees Cecilius

Describe the demand and marginal revenue curves faced : Describe the demand and marginal revenue curves faced by a firm in a purely competitive market. Are they different from those faced by a firm in oligopolistic competition? If so Why?

User Account

All Pages