3. A random sample of 20 pieces of cotton fiber was taken and the absorbency on each piece was measured. The following are the absorbency values: 16.71 22.54 27.54 21.54 21.41 23.78 23.78 24.89 25.91 19.61 18.71 Determine the CoV, asymmetry of the distribution and the degree of peakedness.

Draw a normal curve representation for the area…then find the numerical value of the area under the normal curve.a) below the meanb) to the left of z = -2.17c) greater than z = 1.28d) between 2.16 and 2.49 standard deviations above the mean

Given the following pairs of z-values, find the area under the normal curve between each pair of z-values. Refer to the table in Appendix B.1. (Round the final answers to 4 decimal places.)       a. z = -1.95 and  z = 0.75       b. z = -1.05 and  z = -0.75       c. z = 1.77 and  z = 2.98       d. z = -2.43 and  z = 1.43

I have no clue how to solve please help