Sample observations were randomly chosen
The following sample observations were randomly chosen.
X: 5 3 6 3 4 4 6 8
Y: 13 15 7 12 13 11 9 5
-Find out the coefficient of the correlation.
-Test the null hypothesis: H_0: ?=0,H_1: ??0 at the five percent significance level.
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Determine what approximate ratio of acid and salt is needed, to make the pH 8.8 of a boric acid-sodium borate buffer solution , where pKa of borate acid is 9.24
When 3.00 g of propane, C3H8, is burned in a bomb calorimeter whose heat capacity is 32.7 kJ/K, the temperature increases by 4.62 Kelvin's? Propane is used as a home fuel in some areas. Determine the heat of combustion of propane in
At STP a balloon filled with 1.00 mole of helium gas is heated to 298 K at constant pressure. Determine the change in internal energy. Where CHe = 5.20 J/g oC
A sample which is having 16.20-mL of sodium hydroxide solution is titrated to the stoichiometric point with the 18.60 mL of a 0.262 M solution of HNO3. Find out the molarity of the sample of sodium hydroxide?
A sample which is having of calcium hydroxide was dissolved in the 250.0 ml of water. It was found that 14.80 mL of this solution was required to reach the stoichiometric point in a titration of 28.24 mL of a solution of HCl. Discuss the molarity
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Assume that the number of years car will run is exponentially distributed with the parameter µ = 1/4. If Prosser purchases a employed car today, determine the probability that it will still run after 4 years?
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