Lab: Sampling Bacteria Purpose: Refer to handout sheet. Materials: Refer to handout sheet. Procedure: Refer to handout sheet. Pre-Lab Questions: 1. Why is one dish being reserved for the class as a "control"? Having a controlled variable is important in order to be able to look at what the bacteria would look like if it hadn’t been contaminated and just left as agar. Having a sample of agar that wasnt exposed to any bacteria will provide a clear picutre of what grew on the agar
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Types of Sampling In applications: Probability Sampling: Simple Random Sampling‚ Stratified Random Sampling‚ Multi-Stage Sampling * What is each and how is it done? * How do we decide which to use? * How do we analyze the results differently depending on the type of sampling? Non-probability Sampling: Why don’t we use non-probability sampling schemes? Two reasons: * We can’t use the mathematics of probability to analyze the results. * In general‚ we can’t count on a non-probability
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Ans.1: Non-Probability Sampling: When the units of a sample are chosen so that each unit in the population does not have a calculable non-zero probability of being selected in the sample‚ this is called Non-Probability Sampling. Also‚ Non-probability sampling is a sampling technique where the samples are gathered in a process that does not give all the individuals in the population equal chances of being selected. In contrast with probability sampling‚ non-probability sample is not a product
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misinterpretation of data by decision makers Points Received: 0 of 1 Comments: Question 2. Question : To design a marketing information system‚ analysts need to know __________. Student Answer: what types of decisions each decision maker regularly makes what types of special studies are periodically requested what information is necessary to make decisions the frequency with which information is expected All of the above Points Received: 1 of 1 Comments: Question 3
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ratio numerical data f) a discrete ratio numerical data 3. Which one(s) could be used for analyzing nominal data? Circle all applied. a) percentage b) percentile c) CV d) mean e) standard deviation 4. Which one could be used for analyzing ordinal data? Circle all applied. a) percentage b) percentile c) CV d) mean e) standard deviation 5. If we like to check the reliability of an instrument using similar instrument which measures same concepts and/or constructs‚ it is a) test-retest
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Sampling is concerned with the selection of a subset of individuals from within a statistical population to estimate characteristics of the whole population. Acceptance sampling is used to determine if a production lot of material meets the governing specifications. Two advantages of sampling are that the cost is lower and data collection is faster than measuring the entire population. Sampling is the process of selecting units (e.g.‚ people‚ organizations) from a population of interest so that
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Systematic Matching sampling is a way‚ a procedure or a manner of taking action following processes. In such cases before conducting field research‚ it is taking a certain approach of identifying which course of action best suits the chosen field of study with concern to undertaking research. The purpose of this essay is to discuss what systematic matching is and how researchers use this method to determine satisfactory results. “The purpose of matching is to find an available respondent who is
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[pic] Further Details: Steve McClure Tel: - +441376 536838 / +447703519426 ----------------------- HS&E bulletin 07/2004 Recently‚ a serious incident occurred following the sampling of an LPG vessel. The inspector obtained hydrocarbon liquefied gas samples using two gas sample cylinders‚ commonly called ‘gas bombs’. These cylinders were delivered to a client’s laboratory for testing but the correct procedure for delivering
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ANSWER: Sampling is that part of statistical practice concerned with the selection of an unbiased or random subset of individual observations within a population of individuals intended to yield some knowledge about the population of concern‚ especially for making predictions based on the statistical inference (Ader‚ Mellenberg & Hand: 2008). There are quite a number of sampling methods that can be employed in research and these include simple random sampling‚ systematic sampling‚ stratified sampling
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Difficulty: Medium 3. A random sample is selected so that on each selection from the population every unit remaining in the population has an equal chance of being chosen. Answer: True Difficulty: Easy 4. A process is in statistical control if it does not exhibit any unusual variations. Answer: True Difficulty: Easy 5. An example of a quantitative variable is the make of a car. Answer: False Difficulty: Easy 6. An example of a qualitative variable is the mileage of a car. Answer: False
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