Measured amount of pollution

Assignment Help Finance Basics

Reference no: EM131000680

The intrinsic variations in the measured amount of pollution contained in water samples from rivers and streams in a mining region of West Central United States is known to be a normally distributed random variable with a fairly stable standard deviation of 5 milligrams of solids per liter. As an EPA inspector who wishes to test a random selection of n water samples in order to determine the mean daily rate of pollution within ±1 milligram per liter with 95% con?dence, how many water samples will you need to take? A selection of 6 randomly selected water samples returned a mean value of 40 milligrams per liter and what seems like an excessive variance of 30 (mg/liter)2. Determine a 95% con?dence interval around this estimate of σ2 and comment on whether or not this value is excessive compared to the assumed population value.

Reference no: EM131000680

Questions Cloud

Drafts and documents : Patterns - As you flip through the pages of your notes, drafts and documents, what patterns do you notice? What seems to happen frequently or stand out to you? For instance, you might notice that you always begin your drafts the same way

One''s personal or political point-of-view can greatly : One's personal or political point-of-view can greatly influence the "facts" that they deem most relevant or reliable when determining an answer to a question. In practice, these alternative perspectives and ideologies then result in relatively sound,..

How discrimination affects efficiency within organisations : Discuss how discrimination affects efficiency within organisations, with special emphasis on LGBT issues. Also discuss why we might observe discrimination, given the efficiency implications highlighted in the literature.

What problem is created by the use of lifo in this situation : From a financial reporting perspective, what problem is created by the use of LIFO in this situation? Describe the disclosure required to report the effects of this problem.

Measured amount of pollution : The intrinsic variations in the measured amount of pollution contained in water samples from rivers and streams in a mining region of West Central United States is known to be a normally distributed random variable with a fairly stable standard de..

According to bear net and ellen parentheses : According to bear net and Ellen parentheses 2000, the following form of cultural has been largely ignored from the study of the relationship between pop burn their cultural and social class

Research and discuss an aircraft fire accident : Research and discuss an aircraft fire accident or incident. In your discussion, explain the type of fire detection system used. If an extinguishing system was used, did it help or hinder the resulting fire condition? Make sure to cite references and ..

Months between occurrences of safety violations : The table below shows the time in months between occurrences of safety violations for three operators, "A," "B," and "C," working in a toll manufacturing facility.

Prefer to communicate with our family : For instance, most of us prefer to communicate with our family and friends through technology by chatting, text messaging or video calls rather than to meet up with them.

User Account

All Pages