(12- CLASS-2014)
STATISTICS
TIME: 20 MINUTES
NEW COURSE 
MARKS: 17
OBJECTIVE
NOTE You have four choices for each objective type question as A B C and D . The choice which you think is correct ,fill that circle in front of that question number. Use marker or pen to fill the circles, Cutting or filling two or more circles will result in zero mark in that question,

QUESTION No.#1

• The number of parameters of Nortn.al Distribution is

(A) One          
(B) Two          
(C) Three        
(D) Four

• In a standard normal distribution Qi is equal to

(A) 0.7979      
(B) 0.6745       
(C) — 0.6745 
(D) — 0,7979

• In Normal distribution Man e Deviation

(A) 0.7979  σ    
(B)
(C)  σ
(D) All A,B and C

• A population about which some information is desired is called

(A) Sampled population
(B) Target population
(C) Infinite population
(D) Hypothetical population

• The probability distribution of any statistic is called

(A) Population Distribution
(B) Sampling Distribution
(C) Frequency Distribution
(D) Relative Frequency

• Simple Random samples are taken by

(A) Lottery method
(B) Random number table
(C) Computer
(D) All A, B and C

• A single number used to estimate an unknown population parameter

(A) An interval estimator       
(B) A point estimator
(C) An unbiased estimator       
(D) A Biased estimator

• A confidence interval constructed from

(A) Population value
(B) Sample values
(C) Parameter    
(D) A and C

• A Null. Hypothesis

(A) May be true                  
(B) May not be true
(C) May or may not be true
(D) None

• Regression, the dependent variable is assumed to be

(A) Fixed       
(B) Random
(C) Zero         
(D) None

• Regression coefficient and slop of the line are

(A) Different  
(B) Same        
(C) Unequal   
(D) Independent

• In correlation both variables are

(A) Random          
(B) Non-Random       
(C) Cons-.ant 
(D) Fractional

• The shape of the chi-square distribution is

(A) Symmetrical         
(B) Negatively skewed          
(C) Positively skewed
(D) None

• Absence of attributes is denoted by

(A) Greek letters
(B) Capital letters   
(C) Latin letters          
(D) Block letters

• Seasonal variations in a time series can occur within a Period of

(A) One year 
(B) Two year
(C) Three year
(D) Four year

• Damages due to floods, earthquakes and wars is

(A) Trend       
(B) Seasonal   
(C) Cyclical    
(D) Irregular

• Brain of the Cornputer system is called

(A) CPU         
(B) Main memory       
(C) Hard disk
(D) Monitor

(NEW COURSE)
MARKS : 83
SUBJECTIVE
SECTION-I

QUESTION NO. I write short answers day eight questions of the following (16)

• Write any four properties of Normal distribution       
  
• Write the equation of Normal curve
• What is the relation between binomial distribution and Normal distribution
• The mean deviation of a Normal distribution is 16. Find the value of its  standard deviation
• A Normal distribution has mean 80 and standard deviation 36, Find mod and
• Define Estimation     
• Differentiate between estimator and estimate
  
• What is meant by confidence interval?          
  
• Differentiate between null and alternative hypothesis
  
• Distinguish between simple and composite hypothesis
  
• Who is CPU? 
  
• What are the main categories of digital computers?

QUESTION NO.3 Write short answers if any eight questions of the following 16

• Differentiate between parameter and statistic
  
• Define sampling frame
  
• What is mean by Bias?           
  
• Define sampling Distribution
• What do you understand by standard Error?
• Given n1= 49 n2 .= 36 ,        σ 2=0.36 , σ 2=0.16  Find σ x1-x2
• What is meant by Y-intercept?
• From which point the regression line always passes through?
• Explain what is meant by regressand
  
• Differentiate between linear and non-linear correlation
  
• Given Sxy =16, Sx, Sy =81 Find rxy
  
• Given rxy = 0.75, Sy =5,  (x-x) (y-y) = -15n Find Sx

QUESTION NO, 4 Write short answers of any six questions of the following

• What is meant by positive association?
  
• Define the term class frequency?
  
• What is meant by the term Dichotomy?
  
• Define the term Time Series
  
• Define the term Signal
  
• What is meant by an analysis of time series?
  
• What is meant by seasonal variations?
  
• What is meant by irregular variations?
  
• Define the term Histogram

SEC1 ION —II

(A) Make all possible samples of size 3 with replacement of the population 0, 9 Construct sampling distribution of sample means and find its mean

(B) A random sample of size n =10 has been selected from normal population. The values
Were 20, 25, 26, 29, 30, 35 40, 42, 45, Find 95 % confidence interval for population mean         

(C) Find regression equation of Y on X the following data

X         3          4          5          6          7
7          10        16        I6         20

(D) Test the association between attributes A and B using a 0,05

             Al       A2        A3
B1        506      20        120
B2        20        76        10

(E) Calculate seven days moving average for the following record of attendances