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Sampling and tests of significance are very important tools in business economics. In fact one cannot do any meaningful marketing research without the requisite knowledge of sampling techniques.Any collection (usually large) of individuals or objects is called a population or universe.A finite subset of a population is called a sample. The number of individuals in a sample is called the sample size. 1. Random Sampling: When a sample is taken in such a way that each member of the population has the same probability of being selected, the sample so obtained is called a random sample and the technique is called random sampling. 2. Simple Sampling: It is a special case of random in which each event has the same probability of success and the probability of an event is independent of the success or failure of event in the preceding trails. Thus, simple sampling is a random sampling in which the trails are independent and the probability of success is constant. 3. Large and the small sample: Sample of size n > 30 is called large samples and samples of size n ≤ 30 is called small samples. 4. Hypothesis: In order to make certain decisions about a population on the basis of sample information, some assumption is made about the population. Such assumption, which are not necessarily true, are called statistical hypothesis. 5. Null Hypothesis: The hypothesis tested for possible rejection under the assumption that it is true, is called the null hypothesis. 6. Parameters and Statistics: The Statical constants of the population viz., mean (μ), variance (σ2), etc., are usually referred to as parametrs. The statistical measures computed from the sample observations above, e.g., mean X¯, variance (s2), etc., are called statistics. 7. Level of significance : We are not introducing binomial statement and Normal distribution in this introductory book .The following statements may be taken as given: (i) Normal distribution is the limiting case of the binomial distribution. When n -> α (i.e., the number of trials is indefinitely large) and neither P nor q is very small. (ii) The vitiate Z is defined by
How do I calculate NPV with benefits and costs?
Why do state approaches work into promoting development? State planning and intervention is desirable due to the shortcomings of markets. The approaches range of state through
Demonstrate graphically the cost of income taxation of 30% to consumers and producers for an income of $27,908. How does the taxation change if the income was $220,874? How does
What are the assumptions of Lewis? LDCs (Less Developed Countries) have two (dual) economies as: • Rural traditional economic and social practices, which overpopulated, s
what is nature of elasticity?
A1. Given the following production function Level of fertilizer Level of maize 0 0 1 44.9 2 83.6 3 110.1 4 127.3 5 136.9 6 139.9 7 137.1 8 129.2 a) Calculate the APP, MPP and elas
Explain about the characteristics required in a risk owner. To be effective within their role, a risk owner’ requirements are as follows: a. Adequate information regarding a
Explain the notion of the hidden momentum of population growth. Why is this an important concept for projecting future population trends in different developing nations?
Problem 1: (a) The Mauritian government is now increasingly involving the private sector in the development of the economy. How can government support effective private sector
What do you believe are the consequences of a rating downgrade?
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