Business Statistics Question Paper 2017
Group “A”
Brief Answer Questions: [4×2=8]
- 1) A sample of 100 workers in an electronic company gave a mean assembly time of 348 seconds with standard deviation of 14 seconds. Find the 95%confidence limits for mean assembly time for all workers in an electronic company.
- 2) The age distribution of family heads of a certain village is given below.
| Age of family head | 20-30 | 30-40 | 40-50 | 50-60 | 60-70 | 70-80 |
| No. of families | 12 | 20 | 35 | 25 | 18 | 10 |
Find the modal age.
- 3) In an examination 62% of the students have passed in Sociology, 35% of the students have passed in Basic Mathematics and 24% have passed in both Sociology and Basic Mathematics. A student is selected at random. What is the probability that the students has passed in Sociology given that he has passed in Basic Mathematics.
- 4) Calculate an appropriate measures of dispersion from the following data of monthly rent.
| Monthly rent 00 Rs. | Below 10 | 10-14 | 15-19 | 20-24 | 25-29 | Above 29 |
| No. of employees | 9 | 20 | 35 | 40 | 24 | 12 |