Class limits

The lower class limit of a class is the smallest data value that can go into the class. The upper class limit of a class is the largest data value that can go ... Classlimits,classboundaries,classmarks. Classlimits.Therearetwoforeachclass. Thelowerclasslimitofaclassisthesmallestdatavaluethatcangointo theclass. Theupperclasslimitofaclassisthelargestdatavaluethatcangointo theclass. Classlimitshavethesameaccuracyasthedatavalues;thesamenumberof decimalplacesasthedatavalues. Classboundaries.Theyarehalfwaypointsthatseparatethe classes. Thelowerclassboundaryofagivenclassisobtainedbyaveragingtheupper limitofthepreviousclassandthelowerlimitofthegivenclass. Theupperclassboundaryofagivenclassisobtainedbyaveragingtheupper limitoftheclassandthelowerlimitofthenextclass. Classmarks.Theyarethemidpointsoftheclasses. Theyareobtainedbyaveragingthelimits. ExampleA.  DATA: 210,222,233,etc Class Frequency Classlimits Classboundaries Classmark Classsize 180-199 2  180,199 179.5,199.5 189.5 20 200-219 5 200,219 199.5,219.5 209.5 20 220-239 12 220,239 219.5,239.5 229.5 20 240-259 6 240-259 239.5,259.5 249.5 20   25           ExampleB.  DATA: 10.6,11.7,12.8,etc Class Frequency Classlimits Classboundaries Classmark Classsize 9.6-14.5 10 9.6,14.5 9.55,14.55 12.05 5 14.6-24.5 20 14.6,24,5 14.55,24.55 19.55 10 24.6-44.5 30 24.6,44.5 24.55,44.55 29.55 20 44.6-54.5 25 44.6,54.5 44.55,54.55 49.55 10   85         Open-endedclassesareclassesthatdonothaveeitheranupperlimit oralowerlimit.