statistics

6. During one shift. the express lane clerk recorded how many times customers violated the "10 Items or less\" rule for his lane. In particular, he recorded how many items over the limit each violator placed on the conveyor belt. This data is summarized In the histogram below. NOTE: The last class actually represents "7 or more items." notjust 7 items. 12 10 Fraqmmy 0.5 1.5 2.5 3.5 4.5 5.5 6.5 15 #'mowrl Q What is the frequency of times the Ilmit was exceeded by at most 4 Items? 7. The owner of an art gallery is interested in determining how much consumers might pay for framed prints. A research rm hired by the gallery owner collected input from n = 40 consumers. The sample data ls summarized In the frequency distribution polygon shown below. I} How many consumers would pay between [75, 80) dollars for a framed print? 8. A researcher for the EPA measured the amount of arsenic in the water near a sewage treatment plant. Over 12 days. he took n = 40 measurements (in ppb). His sample data Is summarized in the frequency distribution polygon shown below