Business Statistics Archives

Business Statistics Old Question Collection – Year 2016 to Year 2018 | Tribhuvan University

July 11, 2022June 21, 2021 by Author

Here is the collection of Old Questions of Business Statistics from BBA program affiliated to Tribhuvan University.

Business Statistics Old Question Paper Year 2018 – Tribhuvan University | BBA
Business Statistics Old Question Paper Year 2017 – Tribhuvan University | BBA
Business Statistics Old Question Paper Year 2016 – Tribhuvan University | BBA

July 11, 2022June 21, 2021 by Author

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

July 11, 2022June 21, 2021 by Author

Brief Answer Questions: [4×2=8]

1) What is sampling? List down the various random sampling techniques.
2) One hundred and twenty Students appeared for a English class test and following are the marks distribution.

Marks	0-20	20-40	40-60	60-80	80-100
No. of students	10	25	40	30	15

Find the modal marks of the students.

3) A bag contains 3 red, 2 black and 5 white balls. If two balls are drawn at random, what is the probability of getting () both red balls (ii) both white balls.
4) A random sample of 100 patients suffering from a certain disease was given a serum treatment. It was observed that 80% were relieved of the disease. Find 99% confidence limits for the percentage of patients cured.