Question

Coding language is Matlab

Given a mock set of grades and names of students:

studentNames = ["Amy", "Flynn", "Barbara", "George", "Jonathan", "Isaac", "Cindy",

"Hank", "Elaine", "Debbie"];

Test1 = [79, 71, 98, 68, 65, 97, 72, 68, 68, 82];

Test2 = [61, 94, 98, 66, 91, 90, 76, 86, 67, 88];

Final = [68, 84, 85, 90, 91, 85, 88, 80, 51, 72];

I need the following questions answered and coded out:

a) “

If Test 1 and 2 were worth 30% each of the grade, and the final was worth 40%what is the average grade for each student.

b) Which students made above average on both test 1 and test 2

c) Which students made above average on the final, but below average on both tests.

d) Which student had the best average overall?

e) Who was the lowest scoring student on each exam

On each question I want the student name, and the output to a file names “students.txt” in a

complete sentence

. Use %s in your print statements to print a string similar to the example:

fprintf(fileID, “student name is %s”, studentName);

Answer 1

% Matlab script to calculate some statistics on the grades of students in
% Test1 , Test2 and Final and output the results to file
% define the vectors of names and scores
studentNames = ["Amy", "Flynn", "Barbara", "George", "Jonathan", "Isaac", "Cindy", "Hank", "Elaine", "Debbie"];
Test1 = [79, 71, 98, 68, 65, 97, 72, 68, 68, 82];
Test2 = [61, 94, 98, 66, 91, 90, 76, 86, 67, 88];
Final = [68, 84, 85, 90, 91, 85, 88, 80, 51, 72];

% open the output file
fid= fopen('students.txt','w');

%a) If Test 1 and 2 were worth 30% each of the grade, and the final was worth 40%what is the average grade for each student.
% calculate the weighted grade for each student
weighted_grade = Test1.*0.3 + Test2.*0.3 + Final.*0.4;
% output the result to file
for i=1:length(studentNames)
fprintf(fid,'Average grade for %s is %.2f\n',studentNames(i),weighted_grade(i));
end

%b) Which students made above average on both test 1 and test 2
% find returns the index of students who made above average on both test 1 and test 2
students_above_avg_both_tests = find(Test1 > mean(Test1) & Test2 > mean(Test2));
% output the results to file
for i=1:length(students_above_avg_both_tests)
fprintf(fid,'%s made above average on both test1 and test2\n',studentNames(students_above_avg_both_tests(i)));
end

%c) Which students made above average on the final, but below average on both tests.
% find returns index of students who made above average on the final, but below average on both tests.
students_above_avg_final = find(Final > mean(Final) & Test1 < mean(Test1) & Test2 < mean(Test2));
% output the results to file
for i=1:length(students_above_avg_final)
fprintf(fid,'%s made above average on Final both below average on both tests\n',studentNames(students_above_avg_final(i)));
end

%d) Which student had the best average overall?
% calculate the overall average grade for all students
overall_average_grade = (Test1+Test2+Final)./3;
% max returns the maximum overall average grade from overall_average_grade
% vector and the index of students with that grade
[best_average_overall, idx] = max(overall_average_grade);
% output the results to file
for i=1:length(idx)
fprintf(fid,'%s has the best average overall with average grade %.2f\n',studentNames(idx(i)),best_average_overall);
end

%e) Who was the lowest scoring student on each exam
% minimum returns the minimum score for Test1 , Test2 and Final and index
% of students with the minimum score respectively
[min_test1,idx1] = min(Test1);
[min_test2,idx2] = min(Test2);
[min_final,idxfinal] = min(Final);
% output the results to file
for i=1:length(idx1)
fprintf(fid,'%s has the best minimum score of %.2f in Test1\n',studentNames(idx1(i)),min_test1);
end

for i=1:length(idx2)
fprintf(fid,'%s has the best minimum score of %.2f in Test2\n',studentNames(idx2(i)),min_test2);
end

for i=1:length(idxfinal)
fprintf(fid,'%s has the best minimum score of %.2f in Final\n',studentNames(idxfinal(i)),min_final);
end
fclose(fid); % close the file
%end of script

Output: