Question

Biostatistics Name Investigation: Mercury Contamination Professor J. DeMeo Mercury contamination is a serious environmental concern. Mercury levels are Citizens of the Republic of Seychelles, a group of islands in the Indian Ocean, are among those who consume the most fish in the world. The article "Mercury Content of Commercially Important Fish of the Seychelles and Hair Mercury Levels of a selected Part of the Population" (Environ. Research (1983) reported observations on mercury content (ppm) in the hair of fishermen. Listed below is a typical sample of 40 such observations. particularly high in certain types of fish. 13.05 16.30 20.95 10.43 29.35 40.48 12.65 13.59 26.67 16.60 37.44 19.42 21.61 32.22 17.89 58.02 63.79 67.99 35.14 33.71 23.73 18.07 32.76 9.63 13.68 25.66 9.63 28.45 26.08 4.98 31.37 29.92 42.21 21.84 38.93 31.22 18.30 20.82 5.29 6.75 Complete this investigation by doing the tasks outlined below. All responses should be done on these sheets, and any math should be shown neatly. This work is to be completed solely by you with no consultation with anyone else. If a violation of the University's Policy on Academic Integrity occurs, the matter will be dealt with accordingly. M.innatra cartifiee that L did thie aceinnmant tatally on mu owAn without assistance from anvone else or other

Answer 1

data

13.05
16.3
20.95
32.76
9.63
10.43
29.35
40.48
12.65
13.59
28.45
26.08
13.68
25.66
9.63
26.67
16.6
37.44
19.42
21.61
4.98
32.22
17.89
58.02
63.79
67.99
35.14
33.71
23.73
18.07
31.37
29.92
42.21
21.84
38.93
31.22
18.3
20.82
5.29
6.75

mean	25.6655
median	22.785
mode	9.63
midrange	36.485
Range	63.01
sample standard deviation	14.74425
sample variance	217.3928

5-number summary
minimum	4.98
Q1	15.645
median	22.785
Q3	32.355
maximum	67.99

2)

range is 67.99 - 4.98 = 63.01

2^n = 63.01

n is close to 6

hence 6 classes

Fraauer Frequency Table Count Class 0-11.99 12-23.99 24-35.99 36-47.99 48-59.99 60-71.99 15 12 2

3)

f	relative frequeny
6	0.15
15	0.375
12	0.3
4	0.1
1	0.025
2	0.05
40	1

class limits remains same

4)

15 Frequency 2 0 12 24 36 486072 Histogram (Frequency Diagram)

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