DO NOW: calculate the standard deviation for the sample

IBstatisticsunit.notebook

October 23, 2015

Objective: SWBAT create cumulative frequency histograms and cumulative frequency curves.

DO NOW: calculate the standard deviation for the sample: 2, 5, 4, 7, 7, 5 by hand

HW #25:  p.4-5 in packet #1, 3, 5

Sep 10­7:30 AM

HW #24: p. 143 #2, p.149 #4, p.150 #2, p.153 #5 (don‛t create the cumulative frequency graph)

Oct 24­11:40 AM

1

IBstatisticsunit.notebook

October 23, 2015

Creating a cumulative Freq histogram

the following data was observed of speeds of cars driving by:

Oct 27­10:11 AM

Constructing a cumulative frequency curve

first create a cumulative frequency chart

determine the upper boundary of each interval plot the upper boundary, cumulative frequency point for each  interval

the first point plotted (upper boundary of interval before first, 0)

connect with a smooth curve give title and label axis Sep 17­8:00 AM

2

IBstatisticsunit.notebook

October 23, 2015

Oct 28­12:18 PM

3