hw1sol

hw1sol - Solution of HW1(AMS007 Biostatistics(odd number...

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Solution of HW1 (AMS007 Biostatistics) (odd number problem) 1. (a) 45 (b) 27 (c) 0 (d) 26 (e) 431 (f) 2025 (g) 26 (h) 36 (i) 36 (j) 5 (k) 90 (l) 90 3. (a) For female, the mean is 2.43kg, variance is 0.06kg 2 and standard deviation is 0.24kg. Obviously this is a sample. (b) For male, the mean is 2.64kg, variance is 0.04 kg 2 and standard deviation is 0.2kg (c) Female birds have less weight than male ones. The spread of weights is very similar for both male and female birds. 5. (a) Discrete. Because # of ant lion pits is isolated number, coming from counting. (b) Mean is 3 and variance is about 2.94 (c) Median is 3 and range is 8 (d) Calculations in (b) are more informative because mean and variance deal with real value of the data, however median utilizes only the ranks and not the actual values of each recording. Also range uses only two of the data points and is somewhat dependent on sample size. 17. median depth quartile depth
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This note was uploaded on 01/31/2010 for the course AMS 7 taught by Professor Prado,r during the Winter '08 term at UCSC.

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hw1sol - Solution of HW1(AMS007 Biostatistics(odd number...

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