SWBAT: Identify and select a Simple Random Sample (SRS) Do Now: Complete the survey and the questions to follow.

SWBAT: Identify and select a Simple Random Sample (SRS) Population Entire group of individuals about which we want information. Sample Part of the population from which we actually collect information.

SWBAT: Identify and select a Simple Random Sample (SRS) Sample Survey Is a study that uses an organized plan to choose a sample that represents some specific population. Step 1: Define the population we want to describe. Step 2: Say exactly what we want to measure. Step 3: Decide how to choose a sample from the population.

SWBAT: Identify and select a Simple Random Sample (SRS) Bad Samples Convenience Sample Individuals easy to reach Voluntary Response Sample Individuals who choose themselves often produce unrepresentative data people with strong opinions are most likely to respond bias

SWBAT: Identify and select a Simple Random Sample (SRS) Do Now:

SWBAT: Identify and select a Simple Random Sample (SRS) Simple Random Sample A sample in which individuals have equal chance of being selected. Table of Random Digits Calculator Step 1: Label. Give each member of the population a numerical label of the same length. Step 2: Table. Read consecutive groups of digits of the appropriate length from Table D. Your sample contains the individuals whose labels you find. MATH Prob 5: RandInt(

SWBAT: Identify and select a Simple Random Sample (SRS) Example: There is a big teacher’s convention coming up and White Plains HS wants to send 5 of its teachers to represent the school. There were 18 teachers who want to go, but only 5 will make the cut. Use line 123 to randomly select the 5 teachers to go to the convention. The 18 teachers are listed below: LeeLevine MarchettiJoseph PhillipsHertel LambertCortino WilliamsJohnson DiazRoma SibirizziDavis ButiniSpicconardi StantonSpatola