Find and interpret the mean daily ammonia level in air

Assignment Help Basic Statistics

Reference no: EM131402402

Ammonia from vehicle exhaust. Three-way catalytic converters have been installed in new vehicles in order to reduce pollutants from motor vehicle exhaust emissions. However, these converters unintentionally increase the level of ammonia in the air. Environmental Science and Technology (September 1, 2000) published a study on the ammonia levels near the exit ramp of a San Francisco highway tunnel. The data in the next table represent daily ammonia concentrations (parts per million) on eight randomly selected days during afternoon drive-time in the summer of 1999.

AMMONIA
1.53	1.50	1.37	1.51	1.55	1.42	1.41	1.48

(a) Find and interpret the mean daily ammonia level in air in the tunnel.

(b) Find the standard deviation of the daily ammonia levels. Interpret the result.

(c) Suppose the standard deviation of the ammonia levels during morning drive-time at the exit ramp is 1.45 ppm. Which time, morning or afternoon drive-time, has more variable ammonia levels?

Reference no: EM131402402

Questions Cloud

Unrelated cash method shareholders : Broadbill Corporation, a calendar year C corporation, has two unrelated cash method shareholders: Marcia owns 51% of the stock, and Zack owns the remaining 49%. Each shareholder is employed by the corporation at an annual salary of $240,000.

Analysis and interpretation of financial statements : Andrew Simms, one of your good friends, has inherited amodestsum of money from his grandfather, who passed away late last year. Currently half of the money is in a term investment and is returning around 2% ininterest.

Evaluate the specific preparation steps in preparedness plan : Evaluate the specific preparation steps in the preparedness plan of a healthcare facility of your choosing. Suggest at least one (1) possible improvement to promote early detection and enhanced surveillance

Choose health care insurance options : 1. Describe two steps you should take to evaluate and choose health care insurance options. 2. Describe one consideration you should take into account when looking into the option of private health care insurance.

Find and interpret the mean daily ammonia level in air : Find and interpret the mean daily ammonia level in air in the tunnel.- Find the standard deviation of the daily ammonia levels. Interpret the result.

Beta corporation earned gross profits : In 2011 Beta Corporation earned gross profits of $800,000. a. Suppose that it is financed by a combination of common stock and $1.04 million of debt. The interest rate on the debt is 8%, and the corporate tax rate is 35%. How much profit is availa..

Create written work utilizing the concepts of critical think : State your position on the topic you selected.Identify (3) three premises (reasons) from the Procon.org website that support your position and explain why you selected these specific reasons. Explain your answers to the "believing" questions ab..

Calculate the corporation tax liability : Also, the corporation paid $20 comma 00020,000 in the form of dividends to its own common stockholders. Calculate the corporation's tax liability by using the corporate tax rate structure in the popup window.

How do you see yourself in the type of family you are : Describe yourself or your family, provide a list of concepts. How do you see yourself in the type of family you are? How do you select a mate? How do you see yourself/family in the process or stages of married life

User Account

All Pages