CLASS-WORK
1. Give specific examples of data that might be gathered from each of the following business disciplines and the industry.
Functional Areas :- Accounting, Finance, Production, Marketing,
Industry: Manufacturing, Agriculture, Insurance, Banking, Travel, Healthcare
2. The following is the marks obtained by students in Statistics:-
|
105
|
133
|
127
|
110
|
129
|
|
118
|
148
|
73
|
87
|
108
|
|
79
|
103
|
144
|
78
|
98
|
|
101
|
142
|
98
|
99
|
86
|
|
94
|
101
|
115
|
79
|
144
|
|
132
|
136
|
101
|
111
|
88
|
|
94
|
125
|
110
|
126
|
147
|
|
80
|
103
|
99
|
107
|
80
|
|
127
|
138
|
116
|
94
|
123
|
|
75
|
124
|
106
|
93
|
96
|
a. Construct a frequency distribution for the data using a class interval of ten.
b. Find relative frequencies of each categories.
c. Find Cumulative Frequencies.
d. Construct a Histogram
e. Construct a Frequency Polygon
f. Construct an Ogive
(For question Number 3,4,5,6 find all the measures of central tendency and measures of variation/dispersion)
3. Consider the following data concerning the number of defects being produced by a manufacturing unit
|
65
|
67
|
71
|
67
|
69
|
65
|
70
|
71
|
67
|
66
|
71
|
72
|
67
|
66
|
68
|
(Median is the value at {(n+1)/2th} observation. Percentile:- Pith percentile occurs at {Pi=(i xn)/100} value. (i) in case this value is a whole number then the Pith percentile is the average of the value occurring at the whole number and the next higher whole number. (ii) in case this multiplication is not a whole number then the Pith percentile occurs at the next higher whole number value of data arranged in ascending order)
4. The rain fall (In mm) in Delhi in the first days of the month of June was as follows:-
65.22, 65.45, 66.62, 65.22, 65.22, 63, 67.82, 63, 64.12, 63
5. A random sample of voters in Delhi, is classified by age group, as shown by the following data.
|
Age Group
|
Frequency
|
|
18
|
-
|
under
|
24
|
80
|
|
24
|
-
|
under
|
30
|
85
|
|
30
|
-
|
under
|
36
|
89
|
|
36
|
-
|
under
|
42
|
98
|
|
42
|
-
|
under
|
48
|
96
|
|
48
|
-
|
under
|
54
|
93
|
|
54
|
-
|
under
|
60
|
95
|
|
60
|
-
|
under
|
66
|
84
|
|
66
|
-
|
under
|
72
|
78
|
6. The students were asked to rate " how important is price in choosing a laptop/mobile". The rating was to be given on a scale measuring 1 to 5 with the following annotations
|
1
|
2
|
3
|
4
|
5
|
|
Highly Unimportant
|
Unimportant
|
Neither Important nor Unimportant
|
Important
|
Highly Important
|
The scores obtained from the survey of 50 students is as follows :
|
PRICE RATING
|
FREQUENCY (f)
|
|
1
|
65
|
|
2
|
66
|
|
3
|
73
|
|
4
|
78
|
|
5
|
83
|
|
TOTAL
|
n=Σf= 365
|