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Variables tend to have ranges that differ greatly from each other. Data miners must normalize the numerical variables to standardize the scale of effect each variable has on the results.
A graduate students has just completed first draft of his 700 page dissertation. Compute the estimated standard error of the mean.
Arrange the data in array from highest to lowest. Construct a relative frequency distribution with 10-minute intervals.
Compute standard deviation and variance for the given data. The table shows the number of students falling in various classes according to the marks obtained in the Geography paper.
In regression study, the two regression lines are: 2X – 3Y + 6 = 0 and 4Y – 5X – 8 = 0. Compute correlation coefficient between X and Y. Also, find out the standard deviation of Y,
Assume that 5 men out of 100 and 25 women out of 10,000 are color blind. A color blind person is selected at random. What is the probability of the person being a male? (Suppose male and female to b
Describe the relationship between Facts and Theory in empirical social research.
Illustrate sampling and non-sampling errors. What are random number tables? Describe their use.
Define the term Laplace distribution. Obtain its characteristic function. And hence obtain its mean and variance.
Describe the concepts of CAN and CAUN estimators. Describe the construction of CAN estimators which is based on moments.
State the prove Lehmann-Pearson Lemma. Give its significance in testing of hypothesis.
What is a sample survey? In what respect is it superior to a census survey? Discuss the basic principles of a sample survey.
Explain a procedure of drawing a sample by two stage sampling and give an example. Describe the applications of two-stage sampling.
Describe the F-test related with the analysis of covariance with one way classified data
Describe the linear model related with analysis of Co-variance with two way categorization.
Describe Quartile Deviation and Standard Deviation in detail.Use matrix multiplication to divide Rs. 30,000 in two parts such that total annual interest at 9% on first part and 11% on the second part
From the following data X 25 22 28 26 35 20 22 40 &
Computer World, an electrical and IT warehouse decreased the price of 32” LED monitors from £599.99 to £399.99. Compute the percentage reduction in price to three decimal places.
Regress wages on education and experience but do so in a way that produces standardized betas. That is, you will have to take each variable and standardize it by subtracting from it the mean and div
Describe about Markov process, ergodic chain and irreducible matrix?
Workers come to a tool store room to enquiry regarding the special tools (needed by them) for a particular job. The average time between the arrivals is 60 seconds and the arrivals are supposed to b
Given n = 10, σ x = 4.5, σ y = 3.6 and sum of the product of deviation from the mean of X and Y is 64 find the correlation co-efficient.
A random sample of 10 boys had the following I.Q’s 70, 120, 110, 101, 88, 83,95, 98, 107, 100. Do these data support the supposition of a population mean I.Q. of 100.
A manufacturer claims that at least 95% of the equipment which he supplies to a factory conforms to specifications. An examination of a sample of 200 pieces of the equipment revealed that 18 were fa
Give the differences between interval estimation and Bayesian estimation?