The test scores of the students in four classes are summarized below. Answer the questions about them.Class A: The range of scores is 43 and the mean score is 105.Class B: The range of scores is 36 and the mean score is 106.Class C: The range of scores is 38 and the mean score is 109.Class D: The range of scores is 39 and the mean score is 100.(a) Based on the information above, which class's scores have the most variability?Class AClass BClass CClass D(b) Based on the information above, which class has the highest scores on average?Class AClass BClass CClass D

Heidi and John are teachers teaching similar classes and both gave their classes an exam.  Here are the summaries for the exam scores:Heidi's class:Mean 75Median 78Standard Deviation 3John's class:Mean 75Median 65Standard Deviation 12 Which of the following statements is most correct?  Group of answer choicesJohn's class had some students who received very low scores, exactly 50% of his students scored less than or equal to 75%, and the scores were quite varied when compared to Heidi's class scores.John's class likely had some outlier scores that were very high, exactly 50% of his students scored less than or equal to 65%, and the scores were quite varied when compared to Heidi's class scores.The scores in John's class were more consistent than the scores in Heidi's class.Since the median is higher than the mean in Heidi's class, there were likely some outlier scores that were very high.John's class likely had some outlier scores that were very high and thus the mean would be the best measure of center for his data set.

in a class of 11 students, 3 students scored 100% marks in a test. other 7 students who passed secured 10,11,20,12,14,26 and 24 marks respectively

45.  Which of the following statistical measures best describe the mathematics performance of the students?*1 pointA. MeanB. MedianC. ModeD. Variance

Teacher JM gives 40-item test in Mathematics where the mean performance of the group is 35 and the standard deviation is 4. Christopher obtained a score of 37. Which of the following best described his performance?*1 pointa. Below averageb. Above averagec. Averaged. d. Excellent

State and explain four features of java programming language (4 Marks)d) Write a Java program that determines a student’s grade. The program will read three types ofscores(quiz, mid-term, and final scores) and determine the grade based on the following rules: -if theaverage score >=90% =>grade=A -if the average score >= 70% and <90% => grade=B -if theaverage score>=50% and <70% =>grade=C -if the average score<50% =>grade=F(7 Marks)