# Probability & Statistics 2019

**Tribhuwan University**

**Faculty of Humanities and Social Sciences**

**OFFICE OF THE DEAN**

**2019**

**Bachelor of Computer Applications**

**Course Title: Probability & Statistics**

**Code No: CACS202**

**Semester: Third Semester**

Group B

Attempt any SIX questions. [6x5 = 30]

2. Describe scope and limitation of Statistics.

3. Determine average wages from following data:

4. Calculate Karl Pearsonâ€™s correlation coefficient from the following data:

5. Estimate the marks in JAVA when the marks in Statistics is 65 by using following data:

6. Fit Binomial Distribution from the following data where p = 0.5

8. Write short notes on simple random sampling.

7. How do you determine sample size in sampling? Explain briefly.

Group C

Attempt any TWO questions. [2x10 =20]

9. Studentâ€™s age in the regular daytime BCA program and the morning time BCA program of a campus are described by two samples. If the homogeneity in age of the class is positive factor in learning make suggestion, with reason, which of two groups will be easier to teach?

10. Given a normal distribution with mean 200 and s.d. 20, find the probability that

i) P(X>180)

ii) P(X<220)

iii) P(160<X<240)

iv) P(X>220)

v) P(X<180 orX>220)

vi) 10% of the values are less than what values of X?

11. The labor productivity indexes of Nepal are recorded as below:

Does the labor productivity index vary due to the;

i) difference in the sector

ii) difference in the time period?