Interpreting Statistics LG: I can evaluate the reliability of data based on its source and margin of error

Data Reliability When trying to evaluate the reliability of data, it is important to consider the source. Data supplied by people or companies who have a vested interest in the topic, may provide biased information

Automobile safety information provided by: Canadian Government Vs. Mazda – Which data source do you feel would be more trustworthy? Why? Consider the Following…

Polls and Margin of Error A Poll is an interview with randomly selected people to determine their opinion about a particular topic. Poll results usually include a margin of error based on the reliability of the data collected.

Should it be legalized? SUSQUEHANNA VALLEY, Pa. —A new poll shows that a large majority of Pennsylvania voters favor legalizing marijuana for medical purposes, but residents are divided over whether possession of even small amounts for recreational use should be legalized. – Survey results released Monday by Connecticut-based Quinnipiac University showed 85 percent believe adults should be allowed to use pot for medical purposes if their doctor prescribes it. But voters are narrowly split on whether possession of small amounts of the drug should be legal for recreational use and whether pot is a gateway to hard drugs. Asked whether they had ever tried marijuana, 55 percent of the respondents said no and 44 percent said yes. The poll involved telephone interviews with 1,405 voters. The sampling error margin is plus or minus 2.6 percentage points, 19 times out of 20

Homework Pg. 202 #4, 10, 11 Finish Assignment: Due Tomorrow!