Compare and contrast the four samples. (Select all that apply). The endotoxin co

Question

Compare and contrast the four samples. (Select all that apply). The endotoxin concentration in farm homes generally exceeds that in urban homes. The endotoxin concentration in settled dust generally exceeds that of bag dust. The endotoxin concentration in urban homes generally exceeds that in farm homes. Settled dust in urban homes shows far less variability than any other scenario. The endotoxin concentration in bag dust generally exceeds that of settled dust. Settled dust in farm homes shows far less variability than any other scenario. A study of the relationship between age and various visual functions (such as acuity and depth perception) reported the following observations on the area of scleral lamina (mm^2) from human optic nerve heads: 2.60 2.70 2.69 3.84 2.42 2.78 4.00 4.30 3.78 4.26 3.50 4.47 2.43 2.56 2.47 3.66 2.95 (a) Calculate sigma x_i and sigma x_i^2. (Round sigma x_i^2 to two decimal places.) (b) Use the values calculated in part (a) to compute the sample variance s^2 and then the sample standard deviation s. (Round your answers to three decimal places.) An engineering construction firm is currently working on power plants at three different sites. Let A_j denote the event that the plant at site i is completed by the contract date. Use the operations of union, intersection, and complementation to describe each of the following events m terms of A_1, A_2, and A_3, draw a Venn diagram, and shade the region corresponding to each one. (a) At least one plant is completed by the contract date.

Explanation / Answer

4)

a)summation xi = 56.79

b) Summation xi^2 = 197.3873

c)variance = 0.4797

d)sd = sqrt(variance) = 0.69260829

2.68 7.1824 2.7 7.29 2.69 7.2361 3.84 14.7456 2.42 5.8564 2.78 7.7284 4 16 4.3 18.49 3.78 14.2884 4.26 18.1476 3.5 12.25 4.47 19.9809 2.43 5.9049 3.56 12.6736 2.87 8.2369 3.56 12.6736 2.95 8.7025 56.79 197.3873

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