How high or low would a weekly standard deviation have to be

Reference no: EM131408409

Taking air samples at random times during a 2-month period, an environmental group finds the standard deviation of ozone concentration measurements in the vicinity of a chemical plant to be 0.03 parts per million (ppm). The group believes the population of ozone measurements is normally distributed, and they have decided to use the 0.03 ppm figure as a baseline for the variability in the values.

They will continue taking air samples, with 12 samples taken at random times during each week. If they find that the standard deviation of observations for any given week is abnormally higher or lower than 0.03 ppm, they will conclude that something unusual is happening at the plant.

Given that the group is estimating σ as 0.03, and assuming that they are relying on a 98% confidence interval, how high or low would a weekly standard deviation have to be for them to conclude that unusual events are taking place at the plant?

Reference no: EM131408409

Questions Cloud

What is the most accurate statement : Using the chi-square table in Appendix A, what is the most accurate statement that can be made about the exact p-value for the test?

Can we conclude that three techniques are equally effective : For mechanics trained by techniques B and C, the respective percentages are 50% and 65%. At the 0.05 level, can we conclude that the three techniques are equally effective?

How much in dividends did duke receive in 2008 : Assume that Duke owns approximately 40 percent of the outstanding common stock of the affiliates and made no additional equity investment on sales during 2008. How much net loss did the affiliates report for 2008?

Compute book value of nover’s long-term equity investment : Compute the book value of Nover's long-term equity investment account as of December 31, 2011, and December 31, 2012.

How high or low would a weekly standard deviation have to be : Given that the group is estimating σ as 0.03, and assuming that they are relying on a 98% confidence interval, how high or low would a weekly standard deviation have to be for them to conclude that unusual events are taking place at the plant?

The community health nurse needs to be open to culture : The community health nurse needs to be open to different cultures. We have all heard this statement, "They are in the U.S. and so they should learn to conform". In our interactions with people, their health is of upmost importance. To be able t..

Write a biographical sketch on caligula : Write a biographical sketch on Caligula explaining what you see as his most notable actions and character traits that impacted Western civilization

Example of a training and development model : For an example of a training and development model, check out the Learning Transfer model created by Ford and Weissbein, which is part of your assigned reading for this module.

Describe the purpose and utility of the clinical flow sheet : Write a 350- to 750-word paper in which you do the following: Describe the purpose and utility of the clinical flow sheet. Explain the importance of the problem list, including what you learned from the Prime SUITE Exercise

User Account

All Pages