Business Statistics Old Question Paper Year 2016
Group “A”
Brief Answer Questions: [4×2=8]
1) The mean and coefficient of variation of a certain data are 20 and 30% Calculate standard deviation and variance.
2) In a nationwide survey, 1500 persons selected at random were asked their opinion about the negative impact of TV on children. Out of this sample, 900 persons answered positively. Construct a 99% confidence limit of the corresponding positive proportion regarding such opinion of all persons.
3) What is sampling? Describe the characteristics of probability sampling.
4) The probability of boy will pass the examination is 0.5 and the probability of girls will pass the examination is 0.4. What is the probability that
a. Both of them will pass the examination
b. None of them will pass the examination