**2309, Tapia, Claribel, Lab 2.**

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1. Go to statsarecool.com handouts page and print the "State Number Code page for Lab 2". Look at the first SRS you took of State Case Codes (St_Case) and determine which states your SRS came from. The first 2 digits of this number represent the state and the last 4 digits are the actual case number. For example 400583 is state number 40 and case number 0583. And 040366 state number 04 and case number 0366. From the State Number Code document we see that 40 represents Oklahoma and 4 represents Arizona. Give the list of states below.

California, Pennsylvania (4), Mississippi, Texas (2), Alabama, Florida, Illinois, Kansas, Arizona, Tennessee (2), Idaho, New York, Missouri, Virginia, Arkansas

2. Why would a stratified random sample be better? Which variable would be reasonable to use as your strata?

A stratified random sample would be better to use to guarantee that each state is represented in the sample. The reasonable variable I would use as my strata for this experiment would be each state.

3. Is this frame representative of the population of all traffic fatalities in the US in 2015? Explain.

No, this frame is not representative of the population of all traffic fatalities in the US because I only took a simple random sample of only 20 traffic fatalities from the National Traffic Fatality 2015 data set. This data set includes a list of all 32,166 traffic accidents in 2015 that were reported with at least one fatality. Many traffic accidents go unreported, therefore the data set is not accurate to utilize and obtain exact information.

**Data set 1. National Traffic Fatality in 2015**[Info]

**Data set 2. Random Treatments Assigned**[Info]

**Data set 3. MJC Math Students**[Info]

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ByfarisjSep 15, 2017

Q 3 is wrong I did not ask about the sample.

graded