STAT 1350 Lecture Notes - Lecture 11: Standard Deviation, Summary Statistics, Standard Score
26 Feb 2018
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Students in a morning and an evening lecture section of stat 1350 were asked how many text messages they had sent the previous day. The resulting summary statistics and boxplots are below. From the box plots, we can see there are more students in the morning section. The largest number of text messages sent in the morning section is ______. The iqr for the evening section is _______. Q3 - q1 = 33-10 = 23. Approximately _____% of students in the evening section send fewer text messages than 50% of the students in the morning section. Suppose one of your classmates analyzed a data set by hand and found the mean to be -6. 343 and the standard deviation to be -3. 3234. This must be wrong; the mean of a data set can never be negative. This must be wrong; the standard deviation of a data set can never be negative.
