Mathematics, 27.01.2020 21:31 lovely222
Teacl smolts are young salmon at a stage when their skin becomes covered with silvery scales and they start to migrate from freshwater to the sea. the reflectance of a light shined on a smolt's skin is a measure of the smolt's readiness for the migration. here are the reflectances, in percents, for a sample of 50 smolts. 57.6 54.9 63.4 57.1 54.8 42.4 63.5 55.5 33.6 63.2 58.3 42.0 56.0 47.7 56.2 56.0 38.7 49.6 42.2 45.7 69.1 50.5 53.0 38.3 60.4 49.2 42.8 44.6 46.3 44.2 59.0 42.0 47.6 47.9 69.2 46.6 68.0 42.9 45.5 474 59.5 37.7 53.9 43.1 51.3 64.6 43.7 42.7 50.9 43.8 (a) find the standard deviation of the reflectance for these smolts. (round your answer to two decimal places.) (b) find the quartiles of the reflectance for these smolts (c) do you prefer the standard deviation or the quartiles as a measure of spread for these data? give reasons for your preference.
Answers: 1
Mathematics, 21.06.2019 18:30
Write an inequality and solve each problem.for exercises 11 and 12, interpret the solution.
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Mathematics, 21.06.2019 23:00
40 points. given: two congruent angles ∠c and ∠r are supplementary. prove: ∠r and ∠c are both right angles. it doesn't have to be exactly 10 rows.statements reasons1. 1. 2. 2. 3. 3. 4. 4. 5. 5. 6. 6. 7. 7. 8. 8. 9. 9. 10. 10.
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Mathematics, 22.06.2019 02:00
Look at this system of equations. -3x + 3y = 12 y = x + 4 the solution set of this system is best explained by which of these statements? a) the graphs of the equations are the same line because the equations have the same slope and the same y-intercept. the system has infinitely many solutions. b) the graphs of the equations are parallel lines because they have the same slope but different y-intercepts. the system has no solution. c) the graphs of the equations are lines that intersect at one point because the equations have the same slope but different y-intercepts. the system has exactly one solution. d) the graphs of the equations are lines that intersect at one point because the equations have the same slope and the same y-intercept. the system has exactly one solution.
Answers: 2
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