Variance and standard deviation for data
The number of shark attacks and death over a recent 5 year period is shown. Find the mean, median, mode, midrange, range, variance and standard deviation for the data. Which data set is more variable?
Attacks
68
50
42
36
75
Death
5
3
2
4
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A solution contains 4.08 g of chloroform (CHCl3) and 9.29g of acetone (CH3COCH3) . The vapor pressures at 35 degrees C of pure chloroform and pure acetone are 295 torr and 332 torr, respectively.
Consider an x-bar chart where the x-bar statistic is normally distributed and an associated x-bar control chart exists. If the process is in statistical control then what is the type 1 error rate of the following rule:
Consider installation on the bottom of the attic roof only. Determine the ratio of the radiation heat transfer after to before the installation of the foil.
A 5.6-µC point charge is located at x = 1.2 m, y = 3.2 m, and a -4.2-µC point charge is located at x = 1.9 m, y = -2.3 m. (a) Find the magnitude and direction of the electric field at x = -2.7 m, y = 1.1 m.
What is the radius of a hydrogen-filled balloon that would carry a load of 5550 N (in addition to the weight of the hydrogen) when the density of air is 1.23 kg/m3?
You are titrating 15.0 mL of an aqueous acetic acid with standard 0.300 Molarity NaOH. The equivalence point is reached at 9.00 pH, after 30,0 mL of the standard base had been added. Calculate Ka for acetic acid.
Determine the power devolped in kW, The exergy destruction rate in kW, and evaluate the exergetic turbine efficiency. Let To=25 deg C, po=1 bar.
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