Estimate the mean difference in ph level for the two years

Reference no: EM13611678

Two years of rainfall acidity data was analyzed at 9 monitoring stations in the eastern United States. For each of two years, (Sept 1, 1978 to Aug 31, 1980) a rainfall adjusted yearly average pH was calculated by each monitoring station. From previous experience, the sample differences are from a normal distribution.

LOCATION 1 2 3 4 5 6 7 8 9

YEAR 1 (X) 3.78 3.96 4.22 4.00 3.96 4.02 4.16 4.30 4.30

YEAR 2 (Y) 4.08 4.06 4.27 4.29 4.09 4.27 4.31 4.31 4.29

(a) Test at alpha= .01 if there is has been a significant change in pH level over the two years. (use Excel to find d and sd, then do the rest by hand).

(b) Estimate the mean difference in pH level for the two years using a 99% confidence interval.

Reference no: EM13611678

Questions Cloud

Black hair in the guinea pig is dominant to white hair in : black hair in the guinea pig is dominant to white hair. in familiesof 5 offsprings where both parents are heterozygous

Estimate the mean difference pcb concentration for the fish : polychlorinated biphenyls pcbs are used in the manufacture of electrical transformers and pose a great danger to health

Oppositely charged parallel plates are separated by 467 mm : oppositely charged parallel plates are separated by 4.67 mm. a potential difference of 600 v exists between the

Prepare the journal entries necessary in 2011 to account : matrix inc. acquired 25 of neo enterprises for 2000000 on january 12011 the fair value and book value of 25 of neos

Estimate the mean difference in ph level for the two years : two years of rainfall acidity data was analyzed at 9 monitoring stations in the eastern united states. for each of two

On january 1 2013 kendall inc began construction of an : on january 1 2013 kendall inc. began construction of an automated cattle feeder system. the system was finished and

How many different passwords could be made using only these : when ben looks at the keyboard he sees fingerprints on the following lettersa e f g l o r v yhow many different

The potential difference between the accelerating plates : the potential difference between the accelerating plates of a tv set is about 20 kv. if the distance between the plates

A white cast iron has 25 proeutectoid fe3c in its : a white cast iron has 25 proeutectoid fe3c in its microstructure.a calculate and find the composition of the cast

User Account

All Pages