s51fish
Metais

# Sheet 1: s51fish

 fish/25m 0 3 0 10 4 3 3 0 3 1 3 10 1 8 8 10 8 15 20 5 1 ratio What level of measurement is the data? 2 20 Determine the sample size n. 3 5.75 Calculate the sample mean x. 4 3.5 Determine the median. 5 3 Determine the mode. 6 0 Determine the minimum. 7 20 Determine the maximum. 8 20 Calculate the range. 9 5.35 Calculate the sample standard deviation sx. 10 0.93 Calculate the sample Coefficient of Variation. 11 4 Determine the class width. Use 5 bins 12 Bins Frequency RF f/n 13 4 11 0.55 8 4 0.2 12 3 0.15 16 1 0.05 20 1 0.05 Sums: 20 1 14 skewed What is the shape of the distribution? 15a 5.75 _What is the point estimate for the population mean µ? 15b 19 df = _How many degrees of freedom? 15c 2.09 tc = _What is tc? 15d 2.5 Error tolerance E 15e 3.25 ≤ µ ≤ 8.25 16a Ho: µ = 5.75 16b h1: µ ≠ 5.75 16c 0.05 alpha α = _Write down the level of significance. 16d 3.18 tc = _What is tc? 16e 1.84 t = _Calculate the t-statistic. 16f 0.1633 p = _Determine the p-value using the t-distribution. 16g 0.8367 Max c 16h fail to reject Reject or fail to? 16i 0.16 Risk of type I error 16j no At a=0.01? Part Two: Regression and Correlation Butterfly Coral 4 8 5 15 17 9 7 12 5 13 14 23 12 21 18 18 4 18 6 28 9 26 11 23 19 0.13 slope 20 16.6 intercept 21 pos Is the correlation positive, negative, or neutral? 22 18.58 x=15 23 10.59 y=18 24 0.1013 Reject or fail to? 25 low strength? 26 0.0103 Calculate the coefficient of determination. 27 1.03% Percent variation... 28 no Is there a relationship? 29 no Can we accurately predict... correl is weak Why or why not?

# Sheet 2: Metais

 Butterfly Hard coral 4 8 5 15 17 9 7 12 5 13 14 23 12 21 18 18 4 18 6 28 9 26 11 23 slope intercept 0.13 16.6 0.1013 0.0103