1,248 b. 1,238 c. 1,148 d. 1,338 4. Multiply: 4,628 x 226 a. 1,045,928 b. 1,054,848 c. 1,405,888 d. 1,045,828 5.
A mean less than 0.480: | 25 percent | 9c. Random numbers. A mean between 0.450 and 0.550: | 92 percent | 9d. Random numbers. A mean between 0.480 and 0.530: | 60 percent | 10.
Pb (NO3) 2 10. A compound is 42.3 % C, 5.94 % H, 32.9 % N, and 18.8 % O and has a molecular mass of 425.25 g/mol. Calculate the empirical and molecular formula. C15H25N10O5 11. How many moles of Al2O3 are produced by the reaction 200. g Al?
(a) (e) (i) 2 5 3 250 41 125 (b) (f) (j) 2 25 81 500 7 500 (c) (g) (k) 27 50 6 125 1 125 (d) (h) (l) 3 500 21 25 27 250 5. (a) (d) 3 1
We can conclude that the data are Poisson distributed. Chi-Square test of independence Problem 12.12 Use the following contingency table to determine whether variable 1 is independent of variable 2. Let α = .01 | Variable 2 | Variable1 | 24 | 13 | 47 | 58 | | 93 | 59 | 187 | 244 | Step 1 Ho: the two classifications are independent Ha: the two classifications are dependent Step 2 d.f = (r – 1) (c – 1) Step 3 α = 0.01 x 2 0.01, 3df = 11.3449 Step 4 Reject Ho if x 2 > 11.3449 | Variable 2 | Total | Variable1 | 24 (22.92) | 13 (14.10) | 47 (45.83) | 58 (59.15) | 142 | | 93 (94.08) | 59 (57.90) | 187 (188.17) | 244 (242.85) | 583
K12_1821161 $500 Answer from 3 Jan 9, 2014 1:03:23 PM Page 34. Blackboard Collaborate ?? K12_1821161 $100 Question from 4 Jan 9, 2014 1:03:23 PM Page 35. Blackboard Collaborate ?? K12_1821161 $100 Answer from 4 Jan 9, 2014 1:03:23 PM Page 36.
Which would have the longer wavelength, light with a frequency of 4.5 X 1014 Hz or light with a frequency of 6.19 X 1014 Hz? (4.5 X 1014 Hz) ______________12. Find the frequency of light if its wavelength is 7.3 X 105 5 picometers. (4.1 X 1014 Hz) ______________13. Find the wavelength in centimeters of light whose frequency is 7.00 X 1016 Hz.
N05/4/PHYSI/SPM/ENG/TZ0/XX+ The mass of an atom of the isotope strontium-92 (92Sr) is of the order of A. B. C. D. 10–23 kg. 10–25 kg. 10–27 kg. 10–29 kg.
Assignment One Answer 1. i) Range = 90 – 15 = 75 Mean = (15 + 24 + 30 + 45 + 66 + 90) / 6 = 45 Variance = ( (15 – 45)2 + (24 – 45)2 + (30 – 45)2 + (45 – 45)2 + (66 – 45)2 + (90 – 45)2 ) / 6 = 672 Standard deviation = √(672) = 25.923 ii) Range = 120 – 2 = 118 Mean = (2 + 29 + 49 + 67 + 90 + 109 + 120) / 7 = 66.571 Variance = ( (2 – 66.571)2 + (29 – 66.571)2 + (49 – 66.571)2 + (67 – 66.571)2 + (90 – 66.571)2 + (109 – 66.571)2 ) + (120 – 66.571) ) / 7 = 1584.816 Standard deviation = √(1584.816) = 39.810 2. i) A∪B = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} (ii) A∩B = ∅ (iii) A∩C
9 | 1 | 1 | 50 | 441 | 96 | 11 | 1 | 1 | 54 | 458 | 96 | 12 | 1 | 1 | 56 | 458 | 104 | 12 | 1 | 1 | 56 | 508 | 106 | 13 | 1 | 1 | 56 | 538 | 126 | 14 | 1 | 1 | 56 | 568 | 126 | 16 | 1 | 1 | 60 | 592 | 145 | 19 | 1 | 1 | 60 | 767 | 156 | 20 | 1 | 1 | 60 | 812 | 156 | 20 | 1 | 1 | 62 | 823 | 185 | 21 | 1 | 1 | 64 | 860 | 203 | 22 | 1 | 1 | 64 | 860 | 203 | 23 | 1 | 1 | 69 | 860 | 234 | 24 | 1 | 1 | 73 | 883 | 234 | 24 | 1 | 1 | 73 | 944 | 234 | 26 | 1 | 1 | 74 | 1076 | 234 | 28 | 1 | 1 | 74 | 1076 | 241 | 28 | 1 | 1 | 80 | 1076 | 243 | 32 | 1 | 1 | 88 | 1132 | 244 | 35 | 1 | 1 | 93 | 1241 | 251 | 35 | 1 | 1 | 100 | 1247 | 261 | 36 | 1 | 1 | 103 | 1426 | 263 | 37 | 1 | 1 | 105 | 1426 | 316 | 37 | 1 | 1 | 105 | 1438 | 325 | 37 | 1 | 1 | 105 | 1456 | 325 | 40 | 1 | 1 | 106 | 1466 | 328 | 41 | 1 | 1 | 109 | 1499 | 328 | 45 | 1 | 1 | 109 | 1617 | 337 | 45 | 1 | 1 | 109 | 1764 | 338 | 45 | 1 | 1 | 114 | 1785 | 338 | 47 | 1 | 1 | 114 | 1785 | 338 | 47 | 1 | 1 | 122 | 1897 | 362 | 48 | 1 | 1 | 122 | 2018 | 373 | 49 | 1 | 1 | 122 | 2305 | 386 | 50 | 2 | 1 | 128 | 2312 | 399 | 51 | 2 | 1 | 129 | 2730 | 399 | 52 | 2 | 1 | 129 | 2764 | 401 | 53 | 2 | 1 | 129 | 2764 | 409