Question

3. The paper 'Mercury Content of Commercially Important Fish.... (Environ. Research (1983) reported the following observations on mercury content (ppm) in the hair of 40 fishermen. 5.40 5.5Q 6.96 9.84 9.84 10.64 12.86 13.26 13.80 16.51 16.81 18.10 18.28 18.51 19.63 21.03 21.16 21.50 (22.00 23.94 25.87 26.29 26.88 28.66 29.56 30.13 31.43 31.58 32.43 32.97 33.92 35.35 37.65 39.14 40.69 42.42 58.23 64.00 64.20 a) Construct a frequency distribution using as the first midpoint 10 ppm and class width 10 ppm, with columns for the class interval, midpoint, frequency and relative freguency b) Using only the frequency distribution, determine the proportion of fishermen in the sample with mercury content c) Construct a histogram for the above data based on th d) Construct a stem and leaf plot with a stem unit of 10 and2 Teaf categories pe e) Find the sample mean median, variance and standard deviation. Show some calculation. less than 35 ppm in their hair. uency distribution mean n+ meliam

Answer 1

2 (b) Propontion o rPm in h aux 너D o 8 2) 80% ok k Sherman hau less than 35 pm me in hair mean= 2577 6tandard--druiationニ14-46 1o 20 30 40 5 6