Probability & Statistics BSCS 2nd Term 2015 Past Paper UOS

University of Sargodha

BS 2nd Term Examination 2015

Subject: Computer Science
Paper: Probability & Statistics (Math-2110)

Time Allowed: 2:30 Hours
Roll Number: 12281
Maximum Marks: 80

Objective Part (Compulsory)

Q#1 Write short answers of the following questions.
(16 x 2 = 32)

i. Differentiate between Parameter and Statistic.
ii. Differentiate between Primary and Secondary Data.
iii. What is Stem and Leaf Plot?
iv. Define Probability.
v. Define Discrete Probability Distribution.
vi. Define Mean of a Random Variable.
vii. Describe the Parameters of Hypergeometric Distribution.
viii. Write down the Mean and Variance of Standard Normal Distribution.
ix. Define Random Sampling.
x. Define Lower and Upper Limit of Confidence Interval.
xi. Write down the expression of Confidence Interval for Proportion.
xii. Define Statistical Hypothesis.
xiii. Differentiate between Null and Alternative Hypothesis.
xiv. Define Test Statistic.
xv. Define Regression.
xvi. What is meant by Nonlinear Regression Model?

Subjective Part

Q#2 Given the following grouped frequency table find the mean.

Q#3 A group of 220 university students were asked how much time they spent using Internet each week. The results have been tabulated below. Using this information, calculate the standard deviation of hours spent on Internet by the 220 students.