ScatterplotCorrelationReview- PDF

ST 101 Topics: explanatory/response, describing sca4erplots, correla5on coefficient (r), causa5on Watch this video and use the informa5on in the video to help you complete this worksheet. Guided Notes Explanatory and response variables Bivariate data: data with two variables. Two quan5ta5ve variables are visualized in a sca4erplot. Income and Food Access Example (H.E.B Grocery Stores) * Zip Code Grocery Store LocaEon Average Household Income Organic Vegetables Offered 78204 South Flores $71,186 36 78207 N. Rosillo st $34,234 4 78204 Nogalitos st $71,186 28 78201 Frederickburg rd $48,760 31 78212 Olmos $78,096 78 78202 New Braunfels $40,506 14 78237 Castroville $38,166 12 78228 Culebra rd $50,398 18 78227 Marbach rd $49,437 38 78240 Babcock rd $66,073 84 78230 Wurzbach rd $86,566 61 78251 W Loop 1604 N $78,176 56 78238 Bandera rd $59,154 62 78223 S.New Braunfels $50,252 44 78221 SW Military $48,364 26 78224 S Zarzamora $56,274 29 78220 W.W. White rd $41,318 15 78209 East basse rd $125,145 95 78216 San pedro $65,911 18 78223 S.E Military dr $50,252 65 78218 Aus5in hwy $53,945 50 78213 West Avenue $59,072 35 78227 Valley Hi dr $49,437 36 78244 Foster dr $72,080 28 78231 N.W Military $108,486 95 78239 Montogomery $70,530 46 Material adapted from the Skew The Script curriculum (skewthescript.org)

2 Using this data from San Antonio, TX, we will explore whether there is a rela5onship between neighborhood income and access to organic items at local grocery stores. Explanatory (independent) variable: the variable that predicts, explains, or influences a trend in the response variable. This variable is plo4ed on the X axis. Response (dependent) variable: the measured outcome. Responds to trends in the explanatory variable. This variable is plo4ed on the y axis. 1) In this example, which variable is the explanatory variable? Why? - House hold income average and zip code, X means eXplanatory 2) In this example, which variable is the response variable? Why? - Response is the organic vegetables offered which is your y variable in this cases. *Dataset compiled by student Linda Saucedo, Fall 2019 Describing sca@erplots 78217 Perrinbeiter rd $57,199 29 78251 FM 471 west $78,176 73 78250 Guilbeau rd $78,288 53 78230 De Zavala $86,566 86 78247 Thousand oaks $84,181 68 78247 O’Connor rd $84,181 56 78251 Potranco rd $78,176 85 78247 Bulverde rd $84,181 86 78248 NW Loop 1604 $135,547 93 78232 18140 San Pedro $92,946 82 78249 9238 Loop 1004 $77,894 96 Material adapted by HS Lee from the Skew The Script curriculum (skewthescript.org) Graphic inspired by mathisfun.com