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## Questions:-

ASSIGNMENT A

Define time series. Describe moving average method
2. What do you mean by Primary & Secondary data? What are the methods to collect them?
3. What is a Hypothesis? Write the procedure for testing a Hypothesis
4. What is the difference between census & sample survey. Write steps in sampling design
5. . A biased coin is tossed 6 times. The probability of heads on any toss is 0.3. Let X denotes the number of heads that come up. Calculate: (I) P(X = 3) (ii) P(1 < X ≤ 5
6. The number of calls coming per minute into a hotels reservation center is Poisson random variable with mean 3. Find the probability that no calls come in a given 1-minute period
ASSIGNMENT B
CASE STUDY
Case Detail:-The length of life of an instrument produced by a machine has a normal distribution with a mean of 12 months and standard deviation of 2 months. Find the probability that an instrument produced by this machine will last

Q.1. Between 7 and 12 months.

Q.2. . Less than 7 months

Q.3. More than 5 months but less than 10 months

ASSIGNMENT C

 1. The mean age of combined group of men and women is 25 years. If the mean age of group of men is 26 and that of group of women is 21, then percentage of men and women in the group respectively is: Options 60,40 80,20 30,70 50,50
 2. What is the weighted mean of first 10 natural numbers whose weights are equal to the corresponding number? Options 7 5.5 5 4.5
 3.Sum of mode and median of the data Options 26 11 28 41
 4. The mean of 9 observations is 16. One more observation is included, and the new mean becomes 17. The 10th observation is Options 18 30 7 26
 5 Given third quartile is 80 & first quartile is 20 then semi-inter quartile range is Options 100 60 30 40
 6.Given third quartile is 100 & first quartile is 25 then coefficient of Quartile Deviation Options 6 75 0.6 125
 7.Given mean is 45  & standard deviation is 15 then coefficient of variation is Options 30 33.33 34 0 .33
 8. Given, covariance of (x ,y ) =10   variance of x =49,variance of y =100,correlation between x and y  is Options 5/8 7/8 1/3 1/7

9.Coefficient of non-determination is

Options

1-r2

r-1

r2

1+ r2

 10.In binomial probability distribution, the dependents of standard deviations must include Options probability of q probability of p Trials all options
 11,The formula to calculate standardized normal random variable is Options x + μ ⁄ σ x - μ ⁄ σ x - σ ⁄ μ x + σ ⁄ μ

 12.In binomial distribution, the formula of calculating standard deviation is Options square root of p square root of pp. square root of nap square root of np
 13.The tail or head, the one or zero and the girl and boy are examples of Options non-functional events complementary events non-complementary events functional events
 14.The method of calculating skewness which is based on the positions of quartiles and median in a distribution is called Options Gary´s coefficient of skewness Sharma´s coefficient of skewness Bowley´s coefficient of skewness Jack Karl´s coefficient of skewness
 15.The median of a moderately skewed distribution is 8, third quartile is 12, first quartile is 8 and inter-quartile range is 4 then relative coefficient of skewness is Options ±8 ±1 ±9 ±11
 16.The kurtosis defines the weakness of the curve in the region which is Options around the mode around the mean around the median around the variance
 17.In measures of skewness, the absolute skewness is equal to Options mean mode mean-mode mean median mean-median
 18.If for a distribution the difference of first quartile and median is less than difference of median and third quartile then the distribution is classified as Options negatively skewed not skewed at all absolute open ended positively skewed
 19.The three times of difference between mean and median is divided by standard deviation to calculate coefficient of skewness by method of Options Professor Keller Professor Kelly Karl Pearson Professor Bowley
 20.If the standard deviation of the population is 35 and the sample size is 9 then the standard deviation of sampling distribution is Options 12.67 11.67 13.67 14.67
 21.In statistical analysis, the sample size is considered large if Options n > or = 30 n < or = 30 n > or = 40 n < or = 50
 22.If the mean of population is 25 then the mean of sampling distribution is Options 50 25 30 20
 23.The standard deviation of a sampling distribution is also classified as Options standard error statistic error sampling error probability error
 24.In sampling distribution, the formula of calculating standard deviation of sample proportion is as Options square root of pan ⁄ p square root of pin ⁄ q square root of nq ⁄ p square root of pp. ⁄ n
 25.The numerical methods and graphical methods are specialized procedures used in Options social statistics education statistics descriptive statistics business statistics
 26.The focus groups, individual respondents and panels of respondents are classified as Options pointed data sources itemized data sources secondary data sources primary data sources
 27.The collection of all the elements such as group of variables for research is classified as Options statistical process population data marginal error
 28.In linear programming, the constraints can be represented by Options equalities inequalities ratios both 1 and 2
 29.The feasible region´s optimal solution for a linear objective function always includes Options downward point upward point corner point front point
 30.The objective of linear programming for an objective function is to Options subset or proper set modeling maximize or minimize row or column modeling adjacent modeling
 31.In linear programming, the objective function and objective constraints are Options quadratic solved linear adjacent
 32.In maximization problem, the optimal solution occurring at the corner point yields the Options mean values of z mid values of z lowest value of z highest value of z
 33.If the arithmetic mean is multiplied to coefficient of variation then the resulting value is classified as Options coefficient of deviation coefficient of mean standard deviation variance
 34.The formula of coefficient of range is Options L+L ⁄ H+H Hal  ⁄ H-L H-L ⁄ H+L H+H ⁄ L+L
 35.Considering the standard deviation, the mean absolute deviation is equal to Options 5⁄4 σ 7⁄8 σ 5⁄8 σ 4⁄5 σ
 36.The sum of highest and lowest value is 80 and the coefficient of range is 0.625 then the difference between highest and lowest value is Options 50 70 80 48
 37. The value of third quartile is 61 and inter quartile range of the set of observation is 48 then value of first quartile is Options 24 34 64 13
 38.Which is the best method to find trend Options free hand least square moving average semi average
 39.Components of time series are Options T,S,C.I T,S.P.I T,C,S,P T,I,C.P
 40.Regression lines intersect at Options mean values median mode correlation

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January 29, 2015