Assignment Set
1. Mention the characteristics of Statistics. Explain any two applications of Statistics.
2. Distinguish between primary and secondary data. What are the methods of collecting primary data?
3. Find Karl Pearson's correlation coefficient between the sales and expenses from the data given below:
|
Sales
(Rs. Lakhs)
|
50
|
50
|
55
|
60
|
65
|
65
|
65
|
60
|
60
|
50
|
|
Expenses (Rs. Lakhs)
|
11
|
13
|
14
|
16
|
16
|
15
|
15
|
14
|
13
|
13
|
4. The incidence of occupational disease in an industry is such that the workers have a 20% chance of suffering from it. What is the probability that out of six workers 4 or more will contract the disease?
5. Use chi-square test to test if the two attributes (Performance and Training)in the following table are independent. Test at 5% level of significance.
|
Performance
|
Training
|
|
Intensive
|
Good
|
Average
|
Total
|
|
Above Average
|
100
|
150
|
40
|
290
|
|
Average
|
100
|
100
|
100
|
300
|
|
Poor
|
50
|
80
|
150
|
280
|
|
Total
|
250
|
330
|
290
|
870
|
6. Construct index numbers of price for the following data by applying:
i) Laspeyre's method
ii) Paasche's method
iii) Fisher's Ideal Index number
|
Commodity
|
Base year
|
Current year
|
|
Price
|
Quantity
|
Price
|
Quantity
|
|
A
|
2
|
8
|
4
|
6
|
|
B
|
5
|
10
|
6
|
5
|
|
C
|
4
|
14
|
5
|
10
|
|
D
|
2
|
19
|
2
|
13
|