The article "Hydrogeochemical Characteristics of Groundwater in a Mid-Western Coastal Aquifer System" (S. Jeen, J. Kim, et al., Geosciences Journal, 2001:339-348] presents measurements of various properties of shallow groundwater in a certain aquifer system in Korea. The measurements of electrical conductivity (in microsiemens per centimeter) for 23 water samples are provided in the table below. Use these values to calculate the following "by hand". Hand calculations may be aided with the use of spreadsheets or software like Excel as long as the only functions used are sort, sum, product, difference, square, squareroot and all intermediate output is included in your answer. a. Calculate the mean by hand.
b. Interpret the mean.
c. Calculate the variance by hand.
if necessary.
d. Calculate the standard deviation using the work already done for the variance. if necessary.
e. Interpret the standard deviation.
f. Find the median. You must show your work.
g. How do the mean and median compare? What does it tell you about the distribution?
h. Find the quartiles of the data set. You must either show your work.
i. Calculate the interquartile range (IQR). Please be sure to show your work.
j. Determine if this data set contains any outliers. Please be sure to show your work and to explain your conclusion.
k. Construct the outlier boxplot by hand.
l. What does the outlier boxplot tell you about the shape of the distribution?

The ksp expression for the system pbcl2(s) pb+2(aq) + 2 cl-(aq) is: [pbc12][pb+2][2cl-] [pb+2][cl-]2 [pb+2][2cl-]2 [pbcl2][pb+2][cl-]2 [pb+2][2cl-]2[pbcl2]

Complete the worksheet. use 3.14 for π and round all decimals to the nearest hundredth. find the volume of the composite three-dimensional figure above. important terms are written in bold.1. the pyramid has a square base that is inscribed in the circular base of the cone. draw an image of the composite shape of the base. 2. if the side length of the square base is 8 units long, what is the diameter of the circular base of the cone from the picture in number 1? 3. now that the diameter has been calculated, what is the circular area of the cone? ignore the square base of the pyramid.? 4. what is the formula for volume of a cone? 5.to calculate the volume of the cone, the height is still needed. if the cone has a lateral surface with a length of 13 units, what is the height of the cone? 6.now find the volume of the cone. do not include the empty space for the pyramid. 7.. the side length of the square base of the pyramid is 8 units long. what is the base area of the pyramid? 8.what is the formula for the volume of a pyramid9. since the cone and the pyramid share the same vertex, what is the volume of the pyramid10.using the volume of the cone and the pyramid, find the volume of the composite shape. remember, the pyramid is empty. 11,. referring to the picture in number 1, what is the area of the composite base knowing that the square is empty? 12what is the formula to find the lateral surface area of a cone? (13find the lateral surface area of the cone14what is the lateral surface area shape of the pyramid? what is the formula for its area? 15to find the lateral surface area of the pyramid the length is still needed. calculate the lateral surface length of the pyramid. 16 now that the lateral surface length is known, what is the lateral surface area of the pyramid17. using the lateral surface areas of the cone and pyramid, along with the area of the composite base, what is the total surface area?

Mr. rose asked his students to draw a quadrilateral with 4 unequal sides. draw an example of this kind of quadrilateral.