Exam 17: Determination of Sample Size: A Review of Statistical Theory

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Measured characteristics of a specific population are called ____________________.

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Find the mean score of the following set of scores: 2,5,7,4,8 .

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Which of the following refers to the proportion of respondents who choose the most positive choice in a multiple choice question?

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A frequency distribution of the population elements is called a:

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If the population mean is assumed to be 20 and the sample standard deviation is 5,a score of 15 would have a Z-value of approximately:

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

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When you add up a set of scores and divide the result by the number of scores,you have determined the ____________________ of the distribution.

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If between 125 and 150 units of a product have been produced each day during the past month,the range of this production is 25 units.

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The formula below is the formula for the ____. The formula below is the formula for the ____.

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The mode is the measure of central tendency that identifies the value that occurs most often.

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Increases in sample size reduce sampling error at a decreasing rate.

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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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"As sample size increases,the distribution of sample means of samples of size n (when randomly selected)approaches a normal distribution" is a fundamental assumption of the central-limit theorem.

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When a researcher wants to estimate national market share based on the results of the test market for a new product in St.Louis and Kansas City,this is an example of:

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If the average units produced in a month by a Ford Motor Co.plant for Ford Explorers is 22,but only 18 Explorers are produced on a given day in that same month,the deviation score for this one day is:

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The standard deviation of the sampling distribution is called the ____________________ of the mean.

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If a researcher wants to study the impact of a price change in each of three regions of the U.S.(Eastern,Midwestern,and Western),the researcher should have a sample size of retailers in each region of at least ____ stores.

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The standardized normal distribution is a purely theoretical probability distribution and is of little use 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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The standardized value of Z is computed by the formula: Z = (X - m)/s.

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