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Magazine Chapter 32: Q32.2-2ITD. (page 676)
Next, we鈥檒l calculate the mean and standard deviation for each variable. (a) The mean( ) is the sum of the data values divided by n, the number of observations:. Calculate the mean number of miRNAs ( ) and the mean number of cell types ( ) and enter them in the data table (for , replace each x in the formula with a y). (b) Next, calculate ( ) and ( ) for each observation, recording your results in the appropriate column. Square each of those results in the appropriate column. Square each of those results to complete the and columns; sum the results for those columns. (c) The standard deviation, s, which describes the variation found in the data, is calculated using the following formula:
Calculate sx and sy by substituting the results in (b) into the formula for the standard deviation.
Short Answer
Data from the study:
Animal Phylum | I | No. of miRNAs (xi) | () | No. of Cell Types (yi) | () | ()() | ||
Porifera | 1 | 5.8 | -37.95 | 1440.2 | 25 | -42.22 | 1782.52 | |
Platyhelminthes | 2 | 35 | -8.75 | 76.56 | 30 | -37.22 | 1385.32 | |
Cnidaria | 3 | 2.5 | -41.25 | 1701.5 | 34 | -33.22 | 1103.5 | |
Nematoda | 4 | 26 | -17.75 | 315.06 | 38 | -29.22 | 853.8 | |
Echinodermata | 5 | 38.6 | -5.15 | 26.52 | 45 | -22.22 | 493.72 | |
Cephalochordata | 6 | 33 | -10.75 | 115.56 | 68 | 0.78 | 0.608 | |
Arthropoda | 7 | 59.1 | 15.35 | 15.35 | 73 | 5.78 | 33.40 | |
Urochordata | 8 | 25 | -18.75 | 351.56 | 77 | 9.78 | 95.64 | |
Mollusca | 9 | 50.8 | 7.05 | 49.7 | 83 | 15.78 | 249.00 | |
Annelida | 10 | 58 | 14.25 | 203.06 | 94 | 26.78 | 717.16 | |
Vertebrata | 11 | 147.5 | 103.75 | 10764.06 | 172.5 | 105.28 | 11083.87 | |
(a) and
(b) The values for each observation are calculated and inserted in the table.
(c) and
Step by step solution
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