# Statistics Chapter 2 - Tabular and Graphical Methods

 .remove_background_ad { border: 1px solid #555555; padding: .75em; margin: .75em; background-color: #e7e7e7; } .rmbg_image { max-height: 80px; } What are the ways to display qualitative data? Frequency DistributionRelative frequency distributionBar graphPie Chart What measurement scales apply to qualitative data? NominalOrdinal How can you display quantitative data? Frequency distribution Relative frequency distributionHistogramCumulative distributions What measurement scales apply to quantitative data? IntervalRatio How many classes are typically in a frequency distribution? 5-20 How do you calculate the width of each class? (largest data value - Smallest data value) / Number of classes What is the class midpoint? The value halfway between the lower and upper class limitsExample: 10-14 (12) What are the 4 rules of frequency distribution classes? Classes can not overlapClasses can not have breaksEach data item must fit into only ONE classClasses must have the same width What is an open-end class? A frequency distribution class that requires only a lower class limit or an upper class limit. What is a symmetric skew? Near perfect bell curve What is a left or negative skew? Longer tail to the left on a histogram. What is a right or positive skew on a histogram? Longer tail to the right. What is the difference between a histogram and a bar graph? A histogram has no spaces between each bar. What is a cumulative distribution? Each value represents the frequency of the current class plus the amounts of all previous classes. What is a crosstabulation? Tabular summary of 2 variablesThe variables can be qualitative or quantitative What are the relevant percentages for crosstabulations? RowColumns What is Simpson's Paradox? Conclusions based on aggregated data may be reversed when we look at unaggregated data. On a scatter diagram, what does it mean when a trend line moves up from left to right? Both values on the x and y axis are increasingThey have a correlation What does it mean when a trend line moves down from left to right? When x increases, y decreases.There is still a correlation What does it mean when there is a straight horizontal line? The y value has no correlation to x. .remove_background_ad { border: 1px solid #555555; padding: .75em; margin: .75em; background-color: #e7e7e7; } .rmbg_image { max-height: 80px; } Authorhonestkyle ID197338 Card SetStatistics Chapter 2 - Tabular and Graphical Methods DescriptionCovers measurement scales and different kinds of frequency distributions Updated2013-04-11T16:17:41Z Show Answers