QNT 561 Week 4 Weekly Learning Assessments - Assignment Chapter 10 Exercise 2 [The following information applies to the questions displayed below.] A sample of 36 observations is selected from a normal population. The sample mean is 12, and the population standard deviation is 3. Conduct the following test of hypothesis using the 0.01 significance level H0: μ ≤ 10 H1: μ > 10 1. Award: 10 out of 10.00 points a.
Real World Applications of Number Theory A. Rounding and Truncation 1. Student 1 received a score of 299 out of a possible 334 points for a term in an unknown class. To find what percentage the student received, one must take the score received and divide it by the total amount of points possible, and then multiply the quotient by 100. In this particular case, the teacher chose to use rounding to attain the final grade of the student. To round to the nearest whole number, one must consider the value in the tenths place.
This is similar to theoretical percent that you used to calculate the percent error in an experiment. The actual yield is the amount of product that is actually obtained in an experiment. This is similar to the actual or experimental percent you used to determine the percent error in an experiment. The formula for percent yield is Actual yield x 100 Theoretical yield For example: if a reaction actually gave you 6.63 g of nitrogen instead of the predicted 10.6 g, the percent yield of nitrogen would be: 6.63 g N2 x 100 = 62.5 % 10.6 g N2 1. According to her pre-lab stoichiometric calculations, a student’s lab experiment should have produced 5.51 g of NaCl.
The pre-1983 penny was made of an alloy of copper and zinc. An alloy is “a substance that has metal characteristics and consists of two or more different elements”. (Coordinated Science, pg.1005) Our objective is to find the metal used inside a post-1983 penny. The accepted value of the density of a post-1983 penny is 7.05g/cm3. “Density is the mass per unit volume of a material”.
Then prepare the unknown sample by pipetting 1 ml of the unknown solution into the cuvette and mix with 1 ml of dilute ferric nitrate. Then after that you calculate the concentration for each of the solutions. Cuvette # | 25 mg/dl Standard | H2O ml | Dilute Iron III Nitrate (ml) | .039 M HNO3 (ml) | Concentration | 1 | 0 | 1 | 0 | 1 | 0 | 2 | 0.1 | 0.9 | 1 | 0 | 0.09 | 3 | 0.3 | 0.7 | 1 | 0 | 0.287 | 4 | 0.5 | 0.5 | 1 | 0 | 0.407 | 5 | 0.7 | 0.3 | 1 | 0 | 0.706 | 6 | 1 | 0 | 1 | 0 | 1.316 | When then use the calibration curve to determine the concentration of the unknown and we get .747. IV. As you can see from our data as the amount of H2O decreases and the 25mg/dl standard increases as does our concentration for the salicylic acids.
aerosol can is the highest of the three alternatives. (See Appendix a- Chain Ratio) 6. The forecasted cannibalization rate for the 10 oz. aerosol can is the lowest of the alternatives. Sales lost will be recuperated by the sale of the 10oz aerosol can and will continue to raise overall revenue.
A resistance box has the following components and tolerances: 10 resistors each of 100KΩ ±0.05% 10 resistors each of 10KΩ ±0.05% 10 resistors each of 1KΩ ±0.05% 10 resistors each of 100Ω ±0.1% 10 resistors each of 10Ω ±0.5% Determine both in ohms and percentage the limit of uncertainty in setting of 453.72KΩ. [ans:227.3Ω, 0.05%] 6. Eight students tuned a circuit for resonance and the following values for the resonant frequency of the circuit were recorded. Compute the arithmetic mean, the average deviation, standard deviation and probable error for the readings. [ans: 539.25, 5.75, 6.54,4.412] |Reading no.
Exercise 10: Acid-Base Balance: Activity 1: Hyperventilation Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. The fastest compensatory mechanism for maintaining pH homeostasis in the human body is You correctly answered: c. the chemical buffering system. 2. An increase in hydrogen ion concentration would You correctly answered: d. decrease pH.