Exam 11: Data Analysis and Interpretation: Part Idescribing Data, confidence Intervals, correlation

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Describe the advantages and disadvantages of the three measures of central tendency: mean,median,mode.

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One important reason for displaying correlational data in a scatterplot prior to computing a correlation coefficient is to make sure

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Which of the following is not a major stage of data analysis?

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When interpreting confidence intervals when there are three or more means,if the intervals do not overlap,we have evidence that

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A correlation coefficient is a ________ summary of the degree of relationship between two sets of scores.

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Having calculated a 95% confidence interval for a single population mean we may state that the odds are 95/100 that the

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The "margin of error" typically reported for survey results estimates the difference between the sample results and the population values due to

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A coherent "story" of data analysis for a study will include

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Which of the following indicates the strongest correlation?

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The ____________ is the best measure of central tendency when there are extreme values in the distribution.

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The direction (positive or negative)of a correlation is indicated by

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A researcher tests a sample of first-grade children for a school district to help the district identify areas in which the curriculum should be changed.The measure is a valid and reliable measure of intelligence.The researcher estimates the population mean for the intelligence scores and observes a large value for the standard error of the mean.The best thing the researcher could do to improve the estimate is

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The _________ the value of the estimated standard error of the mean,the _________ our estimate of the population mean.

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An advantage of a stem-and-leaf display is that

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The relationship between a sample's correlation coefficient and the population correlation ( ρ\rho ,"rho")is

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Distributions of scores for two groups in an experiment can be compared by

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A major approach to "confirming what the data reveal" is the calculation of

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A negative correlation indicates that as values for one measure ___________,the values for the other measure ____________.

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When two variables are correlated,our ability to make ___________ increases.

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The value that splits a frequency distribution into two halves,each half with the same number of values,is the

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