week 6 prep

 

1. The length of each bar on a bar graph is determined by the value of theindependent variable.abscissa.dependent variable.

6.66 points   

QUESTION 2

1. A ________ presents a frequency distribution graphically as a series of bars representing the classes whose heights indicate the number of cases falling into each class.histogramscatter plotline graphstemplot

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QUESTION 3

1. A ________ distribution has a long tail extending to the right (upscale) and a shorter tail on the left.normalpositively skewednegatively skewedbimodal

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QUESTION 4

1. An advantage of the stemplot over the histogram is that only the stemplot allows you toplot the shape of the distribution.preserve the actual score values from the data.determine the center of the distribution.determine the spread of the distribution.

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QUESTION 5

1. ________ are more appropriate than bar graphs when your independent variable is continuous and quantitative.Line graphsScatter plotsPie graphsall of these

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QUESTION 6

1. In a distribution with an even number of scores, the median is determined byfinding the most frequent score in the top half of the distribution and averaging it with the most frequent score in the bottom half of the distribution.finding the arithmetic average of the entire distribution and dividing it in half.averaging the middle pair of scores.finding the most frequent score.

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QUESTION 7

1. The mode is the least popular measure of center because itis insensitive to extreme scores.is difficult to compute.is inappropriate for use with interval data.does not take into account scores other than the most frequent score.

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QUESTION 8

1. For data measured on a nominal scale, you are limited to using the ________ as your measure of center.meanmodemedian

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QUESTION 9

1. The first step you should take when analyzing your data is toconduct the inferential statistical tests you wish to perform.compute treatment means or other measures on which your inferential tests will be based.use exploratory data analysis to determine what patterns may be hidden in your data.plot group means.

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QUESTION 10

1. A correlation matrix results when youcompute all possible correlations among a number of variables.enter your scores into a linear regression analysis.compute beta weights for all your variables.

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QUESTION 11

1. If your distribution has one or more outliers, the ________ is the best measure of spread.range.interquartile range.standard deviation.standard error.

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QUESTION 12

1. If categories are represented by numbers (e.g., 1 = Democrat, 2 = Republican), the categories are said to bedummy-coded.numeralized.pseudonumbered.transformed.

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QUESTION 13

1. The major advantage of using grouped data isthat deviant scores can be hidden.that less time is needed to analyze data.convenience―a single score (e.g., the mean) can be calculated to represent a group s performance.

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QUESTION 14

1. The simplest and least informative measure of spread is thestandard deviation.variance.range.semi-interquartile range.

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QUESTION 15

1. In a positively skewed distribution, the meanunderestimates the center.overestimates the center.is as accurate a measure of the center as is the median.accurately represents central tendency.

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