Wk. 3 - measures of center/location, 5 # sum., boxplot
Mean of frequency table
Data = L1, Frequency = L2 stat - calc - 1-var - List=L1, Frequency=L2 - calculate w/data classes, use class midpoint ex. data= 5-8; midpoint = (5+8)/2 = 6.5 6.5 would be placed in L1 as the data value
lower fence
Q1 - 1.5 x IQR min. value that's not an outlier # < lower fence = outlier
upper fence
Q3 + 1.5(IQR) max. value that's not an outlier # > upper fence = outlier
IQR (interquartile range)
Q3-Q1
mean
average x bar (notation for sample mean) = sum of x /n sum of total values/# of values
5 # sum calculator
list values in L1 stat - calc - 1-var - List=L1, no frequency - calc
median
middle data value aka 50th percentile, 2nd Quartile
5 # summary
minimum, Q1, median/Q2, Q3, maximum
mode
most repeated data value bimodal - 2 modes multimodal - > 2 modes no modes - all values appear the same # of times
mhu =
population average
x bar =
sample average
Box Plot (Box and Whisker Plot) calc
2nd - statplot - plot 1 - boxplot graph - xlist = L1 - graph - zoom - 9 - trace
3rd Quartile/Q3/75th percentile
(max + median) / 2
midrange
(max value + min value) / 2
1st Quartile/Q2/25th percentile
(min. + median) / 2