Height of 100 male students at the Centre for Avionics (ATU) are recorded in the table below.

Table 1.0

Heights (in)

Number of Students

60-62 63-65 66-68 69-71 72-74

5 18 42 27 8

Total = 100

EXX II: The final Grades in Analysis IV of 80 students of the Department ofElectricalElectronics Engineering (K N U S T) are recorded in the following table

Table 2.0 68 84 75 82 68 90 62 88 76 93 73 79 88 73 60 93 71 59 85 75 61 65 75 87 74 62 95 78 63 72 66 78 82 75 94 77 69 74 68 60 96 78 89 61 75 95 60 79 83 71 79 62 67 97 78 85 76 65 71 75 65 80 73 57 88 78 62 76 53 74 86 67 73 81 72 63 76 75 85 77

REQUIRED

1) With reference to table 2.0 find the ff;

a) The highest grade b) The lowest grade c) The range d) The grades of the five highest ranking student e) The grades of the five lowest ranking student f) The grade of the student ranking 10th highest g) The number of student who received grades of 75 or higher h) The number of students who received grades below 55 i) The mean j) The median k) The mode

2)With reference to table 2.0 i.Draw a frequency polygon for the distribution above showing a clearly the classboundaries. ii. Making use of the class marks.Illustrate the aboveon a histogram

3)Find the mean deviation of the highest of the 100 students in table 1.0i. Find the semi-interquartile range for the highest distribution ii. Find also the 10 - 90 percentile range of the height of the students. iii. Find the variance of the higher the highest of the 100 male students. Use a) the standard formulab) The coding method