Determine test t-statistic

Reference no: EM13106974

The changing ecology of the swamps in Louisiana has been the subject of much environmental research. One water-quality parameter of concern is the total phosphorous level. Suppose that the EPA makes 15 measurements in one area of the swamp, yielding a mean level of total phosphorus of 12.3 parts per billion (ppb) and a standard deviation of 5.4 ppb. The EPA wants to test whether the data support the conclusion that the mean level is less than 15 ppb. Calculate the appropriate test statistic to test the hypotheses.

7.50

1.94

3.88

1.94

7.50

Reference no: EM13106974

Questions Cloud

Determine route to maximize utility : In the past few years, the traffic problems in Lynn McKell's hometown have gotten worse. Now, Broad Street is congested about half the time. The normal travel time to work for Lynn is only 15 minutes when Broad Street is used and there is no congesti..

Find the magnitude of the acceleration of the masses : Two masses of 4.00 kg each, connected by a string, slide down a ramp making an angle of 45° with the horizontal. The coefficient of kinetic friction between m1 and the ramp is 0.33. The coefficient of kinetic friction between m2 and the ramp is 0...

What is the greatest speed at which he can drive : A stuntman drives a car over the top of a hill, the cross section of which can be approximated by a circle of radius 160 m. What is the greatest speed at which he can drive without the car leaving the road at the top of the hill?

How interpol achieve task of combating international crime : Explain how does Interpol achieve its task of combating international crime and catch transient fugitives? Does Interpol have any attributes which might be adopted in America for betterment of our police system?

Determine test t-statistic : The changing ecology of the swamps in Louisiana has been the subject of much environmental research. One water-quality parameter of concern is the total phosphorous level.

What is the radius of circle in which the plane is flying : An airplane is flying in a horizontal circle at a speed of 520 km/h. If the wings of the plane are tilted 34° to the horizontal, what is the radius of the circle (in m) in which the plane is flying? Assume that the required force is provided entir..

Describe the major sources of supply base risk : Describe the major sources of supply base risk. what are some of the supply chian risk management tools available to avoid or mitigate supply chain risk?

Evaluate the industry financial performance : Evaluate the Industry’s financial performance by calculating and interpreting the profitability ratios. (Operating profit margin, net profit margin, return on total assets, return on stockholders’ equity)

Discuss whether he should prevail and cite to case law : We are going to have to do away with these old and senile men.’ Jones quit and he sued West shore for employment discrimination. Thoroughly discuss whether he should prevail and cite to case law to support your response.

User Account

All Pages