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AP Biology Chi-Squared PracticeProblems(Set 2)aThe integration of analytical skills in the AP Biology course ew challenge forInmastery of unfamiliar skills I have chosen to front-load analytical skills intobeginning of my course. My students will be assessed with a minimum of 5 grid-inon each unit exam.I have experienced extreme difficulties finding chi-squared problems thatare not all content specific, but still appropriate for the course. In order toimplement the course long strategy I needed a bank of problems that studentscould complete at any time in the course. I've decided to pass these problems I'vedeveloped on to the AP Biology teachers who are experiencing the same struggle!Chi-Squared Formula: x 2 (O-E)2Where:O Observed ResultE Expected Result Sum ofCritical Values:DegreesofFreedom235level] of 4713.39s."20.52
I. When studying animal behavior, the distribution of organismswithina choice chamber can be studiedto identify animalpreferences. 100Isopodsare placed in a Il-choice choicechamber. A cotton ball dampened with distilled water is placedin Chamber A; A cotton ball dampened with vinegar is placed inchamber B, a cotton ball dampened with cough medicine isplaced in chamber C, and a cotton ball dampened with soda isplaced in chamber 10. After 15minutes 17isopods are in chambera; 8 isopods are in the chamber with vinegar, 35 isopods are in thechamber with the cough medicine, and 40 isopods are in thechamber with the soda . Perform the chi-squared test todetermine if the distribution of isopods is significant or due torandom chance. (3 points)a. Complete the grid inspace with the chisquared value.o o ree. 0-0.O ORO0000000000000000000000000eooee0000000000b. Complete the grid inspace with the . Do you reject the null hypothesis?Yes or No2. When studying animal behavior, the distribution of organismswithin a choice chamber can be studied to identify animalpreferences. 8 isopodsare placed into a two choice chamber.Chamber A is covered in red paper; chamber B is covered in bluepaper. After 15minutes 6 isopods are in chamber A, 2 isopods arein chamber B. Perform the chi-squared test to determine if thedistribution of isopods is significant or due to random chance. (3points)
a. Complete the grid inspace with the chisquared value.b. Complete the grid inspace with the 0o o ONOboooo0606bgoo R00000000000000000009boooo00000opopgodooobBbobc. Do you reject the null hypothesis?Yes or No3. A scientists proposes that mosquitoes prefer individuals with acertain blood type. 33 mosquitoes are allowed to choose to drinkfrom samples of blood with 3 types: A, B, and O. After 2 hours the15mosquitoes drank A type blood, Il mosquitoes drank B typeblood, and 7 mosquitoes drank O type blood. Use a chi squareanalysis to determine if mosquitoes prefer to drink one bloodt e over another(3 oints).a. Complete the grid inspace with the chisquared value.eeggggodorooddbbßbbdobq0000bhod d hob*b o db bhoqoobbbqd b«b b dobc. Do you reject the null hypothesis?Yes or Nob. Complete the grid inspace with the criticalvalue.emoopmoUUdo'0000oW ho*op«ooddo 04900660p otoo bdbd
q. Chase insists that Mondays are the worst, and students are morelikely to be tardy on Mondays. In an effort to convince theprincipal to grant a 10minute tardy grace period on WednesdaysChase collects tard data on 50 studentsfor one week.Week DaMondaTuesdaWednesdaThursda# tardFrida12136127Use a chi square analysis to see if Chase is correct, and if studentsare si nificantl more likel to be tard on Monda s.a. Complete the grid inspace with the chisquared value.eeeeee0 000000000000000000000000000000000eeooo0000000000c. Do you reject the null hypothesis?Yes or Nob. Complete the grid inspace with the 000
5. An angry group of parents have petitioned for the right to choosethe music played at prom. The parents suggest that the type ofmusic played increases the likelihood of inappropriate PDAbetween teens. An enterprising AP biology class decides todisprove the parents by measuring the instances of publicdisplays of affection that occur during different songs at a smalldance. The group studies 24 students. Perform a chi-squaredanalysis to determine if the music playing effects the numbers ofPDA s ina ro of teens.# PDASHip HOP8a. Complete the grid inspace with the chi-Country7squared value.0000000000000000000bÅoYo0000000000c. Do you reject the null hypothesis?Yes or NoClassicsMetal63b. Complete the grid inspace withthe criticalvalue.0000060000000000000boooöo RdNN0000000000
AP Biology Chi-Squared Practice Problems (Set 2) The integration of analytical skills in the AP Biology course has a new challenge for AP Biology teachers. In an attempt to facilitate student mastery of unfamiliar skills I have chosen to front-load analytical skills into beginning of my cou
