S.No.: 2.3 b BATCH: 2..010 - i)..o Ib Reg. No.: IL --'END OF SEMESTER EXAMINATIONS, NOVEM BER - 2018

COMPUTER ORIENTED STATISTICAL METHODSSUBJECT CODE: 14UACS09

MAJOR: B.Sc. (Computer Science)TIME : 3 HOURS

SEMESTER : IVMAX. MARK.S: 75

SECTION - A (5 x 2 = 10)

Answer ALL the Questions:

1. What is a random variable? Write the numerical values of random variable

when a coin is tossed two times.

2. Write any two uses of measures of central values.

3. Define Quartile deviation for raw data.

4. Draw the scattered diagram and write its uses.

5. What is a Graph?

SECTION - B (5 x 4 = 20)Answer ALL the Questions:

6. a) It is 8: 5 against the wife who is 40 years old living till she is 70 and 4: 3

against her husband now 50 living till he is 80. Find the probability that

a. both will alive

b. only wife will be alive

(OR)

b) Two dice are thrown at once, write the probability values for the sum of

numbers obtained and also find its expected value.

7. a) Define the term tabulation and write the parts of table.

(OR)

b) Find the arithmetic mean from the following data.

Weight above (kgs ) 20 25 30 35 40Number of Boys 160 145 100 50 9

8. a) Write any four formula to determine skewness.

(OR)

b) The first four moments about origin are 1,4,10 and 46 respectively. Find

kurtosis.

..2 ..

/2/

9. a) Define Correlation and write its various types.

(OR)

b) Find Karl- Pearson coefficient of correlation.

x -3 -2 -1 -1 0 1 2 4y -2 -1 -4 -1 3 3 0 2

10.a) Write the features of SPSS for windows.

(OR)

b) Write any four types of variables used in SPSS with appropriate syntax in

variable view.

SECTION - C (3 x 15 = 45)

Answer any THREE Questions:

11.From the following data find the parameter of Poisson distribution and hence

find the expected frequencies.

No. of Accidents 0 1 2 3 4No. of Days 19 18 8 4 1

12.Find Mean, Median and Mode,

X 3-5 5-8 8-10 10-15 15-20 20-30 30-50

f 10 25 52 173 108 36 16

13.Find Quartile deviation from the following data

X 351- 500 501- 650 651- 800 801-950 951-1100

f 48 189 88 47 28

14.Determine the regression equations and estimate Y when X = 20.X 10 12 13 12 16 15Y 40 38 43 45 37 43

15.Explain Creating, Editing and Managing Data file in SPSS.

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