Exam 7: Sampling

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Although simple random sampling is the simplest of the probability-based sampling procedures,it is not used in marketing research projects as much as other sampling methods,because of a higher probability of non-sampling error.

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In single-stage sampling

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The population mean of a continuous variable is denoted by which of the following symbols?

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In _______________ sampling,the researcher selects every kth element in the frame,after a random start somewhere within the first k elements.

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Degrees of freedom is the

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For the following values,calculate the mean,variance,and standard deviation. Data: 6,8,9,12,15

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The square root of the sample variance is

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A three-stage sampling process would require

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The size of a sample does not necessarily indicate a better study and more accurate results.

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If a researcher wants to improve the precision of a statistic by one decimal point,the sample size would have to increase by _______________ times.

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Systematic sampling is often used in practice because selecting a systematic sample is easy and inexpensive.

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With probability sampling,each element of the population

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A(n)_______________ is the unit about which we seek information,and it provides the basis of the analysis that marketing researchers undertake.

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If the groups developed in cluster sampling are exactly as heterogeneous as the population,then the standard error of the cluster sample will be less than that of simple random sampling.

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If a quota sample has 3 control characteristics,each of which has 2 categories,the total number of sampling cells required would be

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A small value for the coefficient of variation would indicate a relatively homogenous population and that most data points are close to the mean.

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Researching with a full census of the population is always more accurate than using only a sample of that population.

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The situation where a researcher directly selects groups and then uses all of the elements in the groups is called

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The first step of sampling is to define the population.The second step is to

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In practice,the purpose of a sample parameter is to estimate a population statistic.

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