Dave Marotto @caucavid
Love Jazz music Joined January 2014-
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#math45 Correlation Coefficient is a measure of linear strength, how much like a line each one is. The < it looks like a line, weaker it is.
#math 45 In a negative association, as the value of one variable increases, the value of the other variable decreases.(inverse relationship)
#math45 Positive association means that if one variable has a positive increase, then the other variable will show an increase as well
#math45 A Scatterplot is a graph used 4 showing data 4 two quantitative variables & seeing if they r closely related or not related at all
#math45 Variability in a data set is measured by IQR = ( Q3 - Q1). The larger the IQR, the more variable the data set is.
#math45 Re: hat/ box plots, significant amount of overlap is when at least half of one graph overlaps with the other with same common values
#math45 re:typical range, Establish mean, Determine ADM, add ADM to mean, subtract ADM from mean, Take both sums as values for typical range
#math45 re: quiz#2,Q#3 True/False-Great lesson learned today, there was no data avail. on males to compare with females. So, we don't know.
#math45 ADM measures the spread, how far dots/values r away from center/mean. Big ADM=big spread, small ADM=small spread.
#math45 Re: HO#22 for Q's 2&3, methods: largest value and range do not vary from least to most spread. Using # of different values isbetter
#math45 today we briefly reviewed how to round out numbers properly, making sure it's in context to what the data values represent
#math45 the mean is the location where the values of the distances are equally balanced, or evenly distributed. mean balances the deviation.
#math 45 Thanks for the feedback Does our groups driving question actually need 2 be included on our survey we present to ccsf student body
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