Statistics BSCS 3 Semester/Term UOS — University of Sargodha

University of Sargodha

Paper: Statistics

Subjective

Class: Bscs-3rd (IT)

Time: 90 minutes

Exam: Final term

Marks: 40

Name: Roll No:

Q1

(a): A card is drawn at random from a deck of cards. Find the probability of (9)

getting the 3 of diamond.

(b): A jar contains 3 red marbles, 7 green marbles and 10 white marbles. If

a marble is drawn from the jar at random, what is the probability that:

this marble is white?

this marble is green or red?

(c): The blood groups of 200 people is distributed as follows:

50 have typeA blood, 65 have B blood type, 70 have O blood type and

15 have type AB blood. If a person from this group is selected at random,

what is the probability that this person has O blood type?

Q2(a): A life insurance salesman sells on the average 3 life insurance policies (6+5)

per week. Use Poisson's law to calculate the probability that in a given

week he will sell exactly 4?

(b): Explain the types of Estimation?

Q3: Measurements were taken in order to test the null hypothesis that the (10)

Population mean is less then equal to 8.5, having 2 samples 34, 54, 95,82

,12,56 and 28, 92, 75,59,34,90 having variance 923.9 and 759.2 having α =0.05,

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