Ms-08 Solved Assignment

Old Samples – Ignou MS-08 Solved Assignment

Q. “Statistical unit is necessary not only for the collection of data, but also for the interpretation and presentation”. Explain the statement.

Answer. A statistical unit is an object of statistical survey and the bearer of statistical characteristics. The statistical unit is the basic unit of statistical observation within a statistical survey……

Careful planning is essential before collect ing the data. There are different methods of collect ion of data such as census, sampling, primary, secondary, etc., and the investigator should make use of correct method…..

In the process of collection, therefore, one may deal with either decrease entities or events relating to them as in the case of persons, houses, livestock, number of accidents, and number of deaths, or with measurable quantities and value units, such as tones, kilograms. Litres…..

A system of field cheeks by the supervisors should also be introduced the field check should preferably be carried out on a random sub-sample of units, and should be conducted in such a manner that investigators do not have prior knowledge of the work going to be checked……

Q. Write short notes on
a) Bernoulli Trials

Answer. Bernoulli trial (or binomial trial) is a random experiment with exactly two possible outcomes, "success" and "failure", in which the probability of success is the same every time the experiment is conducted…..

The Bernoulli process is a succession of independent Bernoulli trials with the same probability of success. One important question about a succession of n Bernoulli trials is the probability of k success…..

Q. What are quartiles, deciles, and percentiles? State the general equation of computing the ith quartile, jth decile, and kth percentile.

Answer. Quartiles are measures of central tendency that divide a group of data into four subgroups or parts. The three quartiles are denoted as Q1, Q2, and Q3. The first quartile, Q1, separates the first, or lowest, one-fourth of the data from the upper three-fourths and is equal to the 25th percentile…..

There are 99 percentiles because it takes 99 dividers to separate a group of data into 100 parts. The nth percentile is the value such that at least n percent of the data are below that value and at most (100 – n) percent are above that value……

Q. What do you mean by decomposition of a time series? State the essential characteristics of the additive and multiplicative models of time series analysis.

Answer. Time series decomposition involves separating a time series into several distinct components. There are three components that are typically of interest….
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There are three functional forms that are most often used for representing a time series yt as a function of its trend, seasonal, and irregular components….

If the original series has a multiplicative decomposition, then the logged series has an additive decomposition. Using the logs can be preferable when the time series contains many small observations…..

Q. Define correlation & Regression? What is the difference between the two? Give examples of a situation, where you will use them.

Answer. Correlation and regression are the most commonly used techniques for investigating the relationship between two quantitative variables…..

For simple linear regression, the sample correlation coefficient is the square root of the coefficient of determination, with the sign of the correlation coefficient being the same as the sign of b1, the coefficient of x1 in the estimated regression equation…..

If those assumptions are true, then you can interpret the confidence interval of r and the P value testing the null hypothesis that there really is no correlation between the two variables…

The decision of which variable you call "X" and which you call "Y" matters in regression, as you'll get a different best-fit line if you swap the two. The line that best predicts Y from X is not the same as the line that predicts X from Y….

Q. Explain the concept of Maxima & Minima and discuss its managerial applications.

Answer. The terms maxima and minima refer to extreme values of a function, that is, the maximum and minimum values that the function attains. Maximum means upper bound or largest possible quantity. The absolute maximum of a function is the largest number contained in the range of the function…..

The value of the function at a maximum point is called the maximum value of the function and the value of the function at a minimum point is called the minimum value of the function……

A continuous real-valued function with a compact domain always has a maximum point and a minimum point. An important example is a function whose domain is a closed (and bounded) interval of real numbers……

Download Full MS-08 Ignou Solved Assignment Quantitative Analysis for Managerial Applications for Jan-June or July-Dec.As managers, workers, or consumers, we may be interested in such things as maximum revenue, maximum profit, minimum cost, maximum medical dosage….