Exam 13: Big Data Basics: Describing Samples and Populations

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A frequency distribution organized into a table or graph that summarizes percentage values associated with particular values of a variable is called a(n) ____________________.

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One of the most common probability distributions in statistics is the _____ distribution.

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Auxiliary variables are those that the researcher should build into a survey that allow a comparison between sample units that do respond and those that do not respond.

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A cross reference is an estimate of the population mean in the form of a single value.

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An estimate of the population mean in the form of a single value is called a(n) ____________________ estimate.

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Describe the measures of dispersion and explain why standard deviation is used most often.

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When a data set is summarized by counting the number of times each value for a variable occurs in the sample, this is known as a ____________________.

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A researcher must calculate the sample mean to calculate the confidence intervals.

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The midpoint of a distribution, above which and below which half of the scores fall, is called the mode.

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Nicole has created a table that summarizes the number of times a particular value of a variable occurs. Nicole has created a ____ distribution.

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The primary purpose of inferential statistics is to make a judgment about a population.

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The standardized normal distribution has a mean of 1.0 and a standard deviation of zero.

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____ is the long-run relative frequency with which an event will occur.

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List the characteristics of the standardized normal distribution and explain why it is a useful distribution in inferential statistics.

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Which of the following eliminates the drawback of having the measure of dispersion in squared units rather than in the original measurement units?

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Traditionally, market researchers have used the ____________________ percent confidence level in research studies.

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In most cases, the size of the population does not have a major effect on the sample size.

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Discuss the three factors required to specify sample size.

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Measured characteristics of a specific population are called ____________________.

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Which of the following is the symbol for the population standard deviation?

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