9(a)Measures Location SpreadEasy1 markThe table shows the marks of 100 students in a test.mark0<x≤2020<x≤4040<x≤6060<x≤8080<x≤100frequency420313411Write down the modal class.Lower limitUpper limitGrade answerSolutionGrading criteria
9(b)Measures Location SpreadMedium4 marksCalculate an estimate of the mean.AnswerGrade answerSolutionGrading criteria