Q1. Distinguish between Classification and Tabulation. Explain the structure and components of a Table with an example.
Meaning of Classification and Tabulation
Differences between Classification and Tabulation
Structure and Components of a Table with an example
Q2. (a) Explain Arithmetic mean.
(b) The mean wage is Rs. 75 per day, SD wage is Rs. 5 per day for a group of 1000 workers and the same is Rs. 60 and Rs. 4.5 for the other group of 1500 workers.Find the mean and standard deviation for the entire group.
(a) Explanation
(b) Solution
Q3. Mr. Arun and Mr. Bhandari play a game. If Mr. Arun picks up an even number from 1 to 6, Mr. Bhandari will pay him double the amount equal to picked up number. If Mr. Arun picks up an odd number then he has to pay amount equal to double the picked up number. What is Mr. Arun’s expectation?
Q4. The probability that an employee will get an occupational disease is 20%. In a firm having five employees, what is the probability that:
i) None of the employees get the disease
ii) Exactly two will get the disease
iii) More than four will contract the disease
(i) Solution
(ii) Solution
(iii) Solution
Q5. Microsoft estimated that out of 10,000 potential software buyers, 35% wait to purchase the new OS Windows Vista, until an upgrade has been released. After an advertising campaign to reassure the public was released, Microsoft surveyed 3000 buyers and found 950 who are still skeptical. At 5% level of significance, can the company conclude that the population of skeptical people had decreased?
Q6. Explain Chi-square test and the conditions for applying chi-square test

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