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Probability and Statistics Old question BCA Third Semester 2019

Probability and Statistics old Question BCA Third Semester

Probability and Statistics old Question 2020 BCA Third Semester

Group B

Attempt any Six question

2. Write down the process of collecting Primary data

3. Determine first quartile (Q1) 7th Decile (D7) and 80th Percentile (P80) from the following data:

Age in Year101214161820222426
No. of People211243527171185

4. Calculate correlation coefficient between income and expenditure in foods of certain families of Kathmandu Metropolitan from the following information

Income (000 Rs)1011121314
Expenditure in food (000Rs)9891211

5. A box contain 50 item of which 20 are defectives. If one item is selected randomly from the box, what is the probability that it is a non-defective item?

6. What is sampling? The Standard Deviation of marks in an entrance exam in BCA students is 0.5. How large a sample must be taken in oder to be 95% confidence that the error of his/her estimate will not exceed 0.01.

7. Calculate the median and mode from following distribution

Expenditure (000Rs)10 – 2020 – 3030 – 4040 – 5050 – 6060 – 70
Number in families712151385

8. A test was given to three candidates taken at random from three province of Nepal. the scores of candidates are given below:

Gandaki976
Lumbini745
Bagmati656

Carry out one-way ANOVA

Group C

Attempt any two questions

9. From the following data, determine average marks of student, standard deviation and coefficient variation

Marks0 – 1010 – 2020 – 3030 – 4040 – 5050 – 6060 – 7070 – 8080 – 90
No of people549086586282786670

10. Describe simple random sampling with suitable example.


Probability and Statistics old Question BCA Third Semester 2019

Group B

Attempt any Six question

2. Describe scope and limitation of statistics.

3. Determine average wages from following data:

Wage25 – 3030 – 3535 – 4040 – 4545 – 5050 – 5555 – 6060 – 6565 – 70
No of worker10131821242820118

4. Calculate Karl Pearson’s correlation coefficient from the following data:

Sales4341363450
Expenses1022131917

5. Estimate the marks in JAVA when the marks in statistics in 65 by using following data.

Marks in statistics5758595960616264
Expenses7778757882827981

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

No. of health01234
Frequency286246204

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

8. Write short notes on simple random sampling.

Group C

Attempt any Two question

9. Student’s age in the regular daytime BCCA program and the morning time BCA program of campus are described by two samples. If the homogeneity in age of the class is positive factor in learning make suggestions, with reason which of two groups will be easier to teach

Popular BCA ProgramMorning BCA Program
AgeNumber of studentAgeNumber of student
2392719
292318
285305
2210294
301286
214335
2511345
2663511
273362
249324
Total60Total60

10. The labor productivity indexes of Nepal are recorded is below:

SectorYear
 201520162017
Agriculture100125138
Manufacturing1006053
Community and social service1008980

Does the labor productivity index vary die to the;

i) Difference in the sector
ii) Difference in the time period

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